1. 1 Development of Electric Steam Type Dryer for Radiation Controlled Area 2010. 07 ILJIN Radiation Engineering Co., Ltd

2. PresentationPresentation Ⅰ. Introduction Ⅱ. Main subject Performance of the current working clothes dryer and its defect 1 Development of Electric Steam type dryer Development of Electric Steam type dryer 2 Development effect of Electric Steam type dryer Development effect of Electric Steam type dryer 3 Extended suggestions in development of Electric Steam type dryer Extended suggestions in development of Electric Steam type dryer 4 Ⅲ. Conclusion 2

3. 3 Ⅰ. Introduction Ⅰ. Introduction Several troubles were incurred due to insufficient performance of the dryer for the radiation controlled area goods is not enough. of the dryer for the radiation controlled area goods is not enough. Improving the drying performance and supplying the effective working evelopment focusing on the decrease of radioactive waste Parallel development focusing on the decrease of radioactive waste amount generated by abrasion and damage amount generated by abrasion and damage

4. 4 Washing : 30 min, drying : 70 min  Washing : 30 min, drying : 70 min Waiting time similar to a planning overhaul  Waiting time similar to a planning overhaul Increased abrasion and damage due to  Increased abrasion and damage due to long washing time long washing time Washing : 30 min, drying : 70 min  Washing : 30 min, drying : 70 min Waiting time similar to a planning overhaul  Waiting time similar to a planning overhaul Increased abrasion and damage due to  Increased abrasion and damage due to long washing time long washing time Long time to dry fabrics Problems from the dust filter Reduced hat air circulation effect due to  Reduced hat air circulation effect due to accumulated dust accumulated dust Waiting time similar to a planning overhaul  Waiting time similar to a planning overhaul Decreased performance of filter system due  Decreased performance of filter system due to clogging to clogging Risk of air pollution's spreading  Risk of air pollution's spreading Reduced hat air circulation effect due to  Reduced hat air circulation effect due to accumulated dust accumulated dust Waiting time similar to a planning overhaul  Waiting time similar to a planning overhaul Decreased performance of filter system due  Decreased performance of filter system due to clogging to clogging Risk of air pollution's spreading  Risk of air pollution's spreading Performance of the current working clothes dryer and its defects Ⅱ. Main subject Ⅱ. Main subject

5. 5 Lowered system's performance by  Lowered system's performance by evaporated moisture evaporated moisture Possibility of worker's internal exposure  Possibility of worker's internal exposure when working when working Frequent malfunctions and too low fuel  Frequent malfunctions and too low fuel efficiency (too high fuel cost) efficiency (too high fuel cost) Electric Heater type on the decline  Electric Heater type on the decline Lowered system's performance by  Lowered system's performance by evaporated moisture evaporated moisture Possibility of worker's internal exposure  Possibility of worker's internal exposure when working when working Frequent malfunctions and too low fuel  Frequent malfunctions and too low fuel efficiency (too high fuel cost) efficiency (too high fuel cost) Electric Heater type on the decline  Electric Heater type on the decline Other troubles System drawings 1 time moisture amount Performance of the current working clothes dryer and its defects

6. 6 Development of Electric Steam type dryer Defects in Electric Heater hot air circulation type Insufficient hot air circulation due to adherance of clothes to the perforated plate Most hot air is exhausted after just heating the surface of Basket Increased abrasion and damage on the working clothes Increased drying time Heating and steaming type dryer from abroad are similar

7. 7 Improved Electric Steam hot air circulation type ① ② ③ Chilly wind/vent Damper is opened if drying is completed by humidity control system Installed heat exchanger at the latter part of Basket Installed Vent Damper Chilly wind/vent Damper is closed durin g operation. Warm wind Damper is closed if it reaches the saturated level of water vapor pressure by hot air circulation Development of Electric Steam type dryer

8. 88 Main point No. 1 in hot air circulation technology development 1.Installed heat exchanger at the latter part of Basket part of Basket 1.Installed heat exchanger at the latter part of Basket part of Basket Changed design so that hot air can circu- 2. Changed design so that hot air can circu- late inside the Basket late inside the Basket Changed design so that hot air can circu- 2. Changed design so that hot air can circu- late inside the Basket late inside the Basket Installed Vent Damper so that hot air and 3. Installed Vent Damper so that hot air and steam can not escape at once steam can not escape at once Installed Vent Damper so that hot air and 3. Installed Vent Damper so that hot air and steam can not escape at once steam can not escape at once Development of Electric Steam type dryer

9. 99 Main point No. 2 in hot air circulation technology development  Warm wind Damper of heat exchanger is closed if it reaches the proper satur- is closed if it reaches the proper satur- ated water vapor pressure. ated water vapor pressure. Minimizing heat loss 2. Minimizing heat loss  Warm wind Damper of heat exchanger is closed if it reaches the proper satur- is closed if it reaches the proper satur- ated water vapor pressure. ated water vapor pressure. Minimizing heat loss 2. Minimizing heat loss 3.Installed internal sensor to maintain precise temperature and humidity Development of Electric Steam type dryer

10. 10 Main point No. 3 in hot air circulation technology development  Amount of loading fabrics = Amount of steam in the dryer Humidity control is important to keep steam amount constant 2. Humidity control is important to keep steam amount constant  Amount of loading fabrics = Amount of steam in the dryer Humidity control is important to keep steam amount constant 2. Humidity control is important to keep steam amount constant 3.Installed control system so that it can work properly according to the operation condition Development of Electric Steam type dryer

11. 11 Main point No. 4 in hot air circulation technology development  Chilly air damper on the upper part is opened if drying is completed. opened if drying is completed. Vent damper is opened at the same 2. Vent damper is opened at the same time. time.  Chilly air damper on the upper part is opened if drying is completed. opened if drying is completed. Vent damper is opened at the same 2. Vent damper is opened at the same time. time. Chilly air period is minimized. 3. Chilly air period is minimized. Dried state is good without wrinkle. 4. Dried state is good without wrinkle. Chilly air period is minimized. 3. Chilly air period is minimized. Dried state is good without wrinkle. 4. Dried state is good without wrinkle. Development of Electric Steam type dryer

12. 12 Main point No. 5 in hot air circulation technology development Recovering system of waste heat (superconducting heat pipe) is applied to Electric Steam dryer Recovered waste heat is circulated from the beginning of drying to the end Consumption of electric power : decreases by 60%. Drying time : decreases by 50%. Development of Electric Steam type dryer

13. 13 Main point No. 6 in hot air circulation technology development  Condensed water outlet is installed at the side face of the vent hole at the side face of the vent hole  Condensed water outlet is installed at the side face of the vent hole at the side face of the vent hole 2.Installed filter for blocking steam/ discharging condensed water discharging condensed water 2.Installed filter for blocking steam/ discharging condensed water discharging condensed water Development of Electric Steam type dryer

14. 14 Evaluation of Electric Steam type washer & dryer Washing and spin-drying of pollution-free working cloths from radiation controlled area Pollution inspection/Transfer preparation Keep moisture from evaporating by using vacuumed pack, etc. Being transferred to the company with ice-box packing Drying working clothes by using electric steam dryer Checking the drying time and the dried state Development of Electric Steam type dryer

15. (required time for completing dry after washing and spin-drying) Comparison of drying time and the dried state 60min 30min 20min Electric Steam If same period is applied, in case of Heater type, the remained moisture is found in some places such as pickpocket, collar, etc. 70min30 ㎏ (24set) 80min50 ㎏ (40set) Heater type requires 20 min. for pre-heating. 40min10 ㎏ ( 8set) 비 교비 교 Electric Heater 방 식 건 조 량 Type Dried Dried amount amount Electric Heater Electric Steam Comparison Development of Electric Steam type dryer

16. 16 Kind of dust filter and change order & Test 1  Current 5 mm dust filter and vent hole Newly designed 5μm screen dust filter 2. Newly designed 5μm screen dust filter Development of Electric Steam type dryer

17. 17 Kind of dust filter and change order & Test 2 Outlet for sampling is installed at the 1. Outlet for sampling is installed at the vent hole behind the two kinds of dust vent hole behind the two kinds of dust filters filters Outlet for sampling is installed at the 1. Outlet for sampling is installed at the vent hole behind the two kinds of dust vent hole behind the two kinds of dust filters filters Air pollution degree is measured/ 2. Air pollution degree is measured/ analyzed with the same condition analyzed with the same condition during operation during operation Air pollution degree is measured/ 2. Air pollution degree is measured/ analyzed with the same condition analyzed with the same condition during operation during operation Development of Electric Steam type dryer

18. 18 Kind of dust filter and change order & Test 3 Fr equency M ethod 12345678910 5mm0.2720.2130.1960.1730.2570.1580.2840.1840.1490.231 5µm0.0940.0850.0880.0640.0820.1020.1080.0730.0580.114 ( 단위 : ㏃ / ㎤ ) dust filter air pollution degree comparison table (dust filter air pollution degree comparison table) Development of Electric Steam type dryer Sample collection period is complete clrying before 20 minutes and sample collect 10 minutes by same method New filter’s air contamination reduction effect is more 50% than that of current dust filter(5 ㎜ )

19. 19 Kind of dust filter and change order & Test 4 dust filter air pollution degree comparison graph (dust filter air pollution degree comparison graph) Development of Electric Steam type dryer

20. 20 Kind of dust filter and change order & Test 5 State of the inside-remained dust  State of the inside-remained dust after removing the dust filter after removing the dust filter State of the inside-remained dust  State of the inside-remained dust after removing the dust filter after removing the dust filter 2.Nuclide analysis after collecting the remained dust the remained dust 2.Nuclide analysis after collecting the remained dust the remained dust Development of Electric Steam type dryer

21. 21 Kind of dust filter and change order & Test 6 remained dust nuclide analysis table (remained dust nuclide analysis table) Nuclide Method Mn-54Co-58Co-60Total 5mm1.55E+015.83E+001.63E+021.85E+02 5µmN/D4.13E+005.05E+009.10E+00 ( 단위 : ㏃ /g) It depends on the dried material, but, if seeing the nuclide analysis result during development period, in case of changing the dust filter, it shows that it decreases by more than 50% than before. Development of Electric Steam type dryer

22. 22 Kind of dust filter and change order & Test 7 remained dust nuclide analysis comparison table (remained dust nuclide analysis comparison table) Unit: (Unit: ㏃ /g) Development of Electric Steam type dryer

23. 23 Kind of dust filter and change order & Test 8  Side view of the current type dust filter Figure of fiber dust accumulated on 2. Figure of fiber dust accumulated on the filter the filter Figure of fiber dust accumulated on 2. Figure of fiber dust accumulated on the filter the filter Development of Electric Steam type dryer

24. 24 Kind of dust filter and change order & Test 9 It is not easy to remove It is not easy to remove frequently frequently It is required to stop drying temporarily. temporarily. Interruption of hot air circulation dryer's performance is decreased Inflammable fiber dust igh fire risk during operation High fire risk during operation Removing the dust inside the machine machine xposed to the internal exposure Exposed to the internal exposure Development of Electric Steam type dryer

25. 25 Kind of dust filter and change order & Test 10  Side view after the improved dust filter is installed filter is installed  Side view after the improved dust filter is installed filter is installed State of the dust inside the newly 2. State of the dust inside the newly made dust filter made dust filter State of the dust inside the newly 2. State of the dust inside the newly made dust filter made dust filter Development of Electric Steam type dryer

26. 26 Kind of dust filter and change order & Test 11 Making dust go down before/after hot air circulation by 45° installing in the opposite direction opposite direction Screen mesh(T-No), which has excellent safety/strength in heat resistance /expansibility, is applied /expansibility, is applied The dried state is excellent because of the smooth hot air circulation Easy dust removal by the installed collector on the lower part of the filter Development of Electric Steam type dryer

27. 27 No.1 compensation of the current dryer's defects  Standard V belt inside the machine is cut off frequently because of its is cut off frequently because of its weakness property weakness property  Standard V belt inside the machine is cut off frequently because of its is cut off frequently because of its weakness property weakness property  Combined V belt, which can be used semi-permanently, is applied. semi-permanently, is applied.  Figure before installing inside the machine machine  Combined V belt, which can be used semi-permanently, is applied. semi-permanently, is applied.  Figure before installing inside the machine machine Development of Electric Steam type dryer Hybrid V belt Standard V belt

28. 28 No.2 compensation of the current dryer's defects  Installed inter-lock device, safety Device, at sliding door so that the Device, at sliding door so that the basket is stopped when the door basket is stopped when the door is opened randomly is opened randomly  Installed inter-lock device, safety Device, at sliding door so that the Device, at sliding door so that the basket is stopped when the door basket is stopped when the door is opened randomly is opened randomly  Planarization of the screws so that the abrasion by the inside-projections can abrasion by the inside-projections can be minimized be minimized  Planarization of the screws so that the abrasion by the inside-projections can abrasion by the inside-projections can be minimized be minimized Development of Electric Steam type dryer

29. 29 No.3 compensation of the current dryer's defects  Current dryer is all-in-one, so it is not easy to transfer and dismantle not easy to transfer and dismantle for repairing. for repairing. Figure after main body is dismantled (Figure after main body is dismantled)  Current dryer is all-in-one, so it is not easy to transfer and dismantle not easy to transfer and dismantle for repairing. for repairing. Figure after main body is dismantled (Figure after main body is dismantled)  Being changing it to built-up-type to make maintenance easy make maintenance easy Assembled part by screw at main (Assembled part by screw at main body's edge body's edge)  Being changing it to built-up-type to make maintenance easy make maintenance easy Assembled part by screw at main (Assembled part by screw at main body's edge body's edge) Development of Electric Steam type dryer

30. 30 Trial test No.1 on removing the particulate pollution Evaluating the removal degree of the particulate pollution, which exists Evaluating the removal degree of the particulate pollution, which exists between fibers, by using drier between fibers, by using drier Proving that the particulate pollution degree can be decreased as water Proving that the particulate pollution degree can be decreased as water vapor is extracted and reacts as a mixed gas after reacting with the vapor is extracted and reacts as a mixed gas after reacting with the water-contained particle water-contained particle Purpose of Trial test Gypsum coating on 10cm×10cm of washed/pin-dried 5 working Gypsum coating on 10cm×10cm of washed/pin-dried 5 working clothes respectively clothes respectively Drying after it is applied equally to the current heater type and Drying after it is applied equally to the current heater type and steam type steam type Trial test method Development of Electric Steam type dryer

31. 31 Trial test No.2 on removing the particulate pollution Trial test procedure and result Picture after coating on the site-protective clothing Coated part enlarged picturePicture after being dried by heater type Picture after being coated by the companyCoated part enlarged picturePicture after being dried by steam type Development of Electric Steam type dryer

32. 32 Trial test No.3 on removing the particulate pollution The removal degree of gypsum pack can not be identified visually The removal degree of gypsum pack can not be identified visually In case of site-heater type, the result was secured after 40 min. drying, In case of site-heater type, the result was secured after 40 min. drying, and in case of steam type, the result was secured after 17 min. drying and in case of steam type, the result was secured after 17 min. drying If considering the completely dried time, it is expected to remove the If considering the completely dried time, it is expected to remove the particulate pollution particulate pollution Trial test result Development of Electric Steam type dryer

33. Division Treated amount(kg) when operating 8 hrs 1 time cost (won) annual operation cost(won) Electric Heater 50Kg 3681,7296,003,339 Electric Heater 80Kg 5212,8829,465,311 Electric Steam 5499884,875,753 33 Tangible effect No. 1 Economical effectindividual performance comparison Economical effect (individual performance comparison) See the data of Korea Textile Machinery Research Institute Development effect of Electric Steam type dryer

34. 34 Tangible effect No. 2 Economical effect performance comparison when the same amount is treated, 549Kg (performance comparison when the same amount is treated, 549Kg) Economical effect performance comparison when the same amount is treated, 549Kg (performance comparison when the same amount is treated, 549Kg) Division Division, 1 day/required time monthly gas cost (won) annual operation cost(won) Electric Heater 50Kg 11.9745,7568,949,076 Electric Heater 80Kg 8.4830,9099,970,911 Electric Steam 8406,3134,875,753 Development effect of Electric Steam type dryer See the data of Korea Textile Machinery Research Institute

35. 35 Tangible effect No. 3 If they are compared with the consumed electric energy simply, the error can be generated in accuracy can be generated in accuracy If they are compared with the consumed electric energy simply, the error can be generated in accuracy can be generated in accuracy By the same level's amount standard, the accumulated cost is the new dryer's price if it is used for more than 3 years dryer's price if it is used for more than 3 years By the same level's amount standard, the accumulated cost is the new dryer's price if it is used for more than 3 years dryer's price if it is used for more than 3 years Drying time can be shorten remarkably by improving the hot air Drying time can be shorten remarkably by improving the hot air circulation method circulation method Unnecessary waiting time can be reduced Unnecessary waiting time can be reduced Damage and abrasion of working clothes are reduced Damage and abrasion of working clothes are reduced Drying time of working clothes is shortened Drying time of working clothes is shortened(30~40%) Development effect of Electric Steam type dryer

36. 36 Intangible effect No. 1 the air pollution degree is decreased by using the newly the air pollution degree is decreased by using the newly manufactured dust filter (5μm) manufactured dust filter (5μm) Dryer's fire risk and operator's internal exposure risk are Dryer's fire risk and operator's internal exposure risk are decreased by the improved dust filter decreased by the improved dust filter Working surrounding is improved because hot air and chill air Working surrounding is improved because hot air and chill air are circulated inside the dryer are circulated inside the dryer Air circulation system's wholesomeness is maintained by Air circulation system's wholesomeness is maintained by collecting the water generated during drying collecting the water generated during drying Improved working surrounding by improving the dust filter Improved hot air circulation method and water collection method Development effect of Electric Steam type dryer

37. 37 Intangible effect No. 2 Using Hybrid V belt instead of standard V belt being cut Using Hybrid V belt instead of standard V belt being cut off frequently off frequently Safety is emphasized by installing the basket stop switch Safety is emphasized by installing the basket stop switch on the sliding door on the sliding door Working clothes damage is minimized by minimizing the Working clothes damage is minimized by minimizing the projects projects Designed as a built-up-type to make dismantle and Designed as a built-up-type to make dismantle and maintenance easy maintenance easy Compensation of the current dryer's defects Development effect of Electric Steam type dryer

38. 38 Extended suggestion In any water contained laundry, it is possible to dry without the damage by In any water contained laundry, it is possible to dry without the damage by heat because it is not heater but steam type heat because it is not heater but steam type Cotton gloves and cotton socks from radiation controlled area can be dried Cotton gloves and cotton socks from radiation controlled area can be dried perfectly without deformation perfectly without deformation Being testing on the proper temperature and saturated humidity in order to Being testing on the proper temperature and saturated humidity in order to be applied to the recycling protectors such as rubber gloves, rag for be applied to the recycling protectors such as rubber gloves, rag for removing pollution, etc removing pollution, etc Enlarging the using of the developed dryer Extended suggestions in development of Electric Steam type dryer

39. 39 Ⅲ. Conclusion Ⅲ. Conclusion Working surrounding is improved by the shortened working clothes drying time. clothes drying time. Working clothes' abrasion and damage are minimized. The particulate pollution is prevented by the improvement of the filter. of the filter. The improvement of protecting equipment in the radiation controlled area is led by preventing fire risk. controlled area is led by preventing fire risk.

40. ILJIN Radiation Engineering Co., Ltd