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Published byDennis Bell Modified over 6 years ago
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PLANNING TODAY FOR ALARA TOMORROW AT BEAVER VALLEY POWER STATION
E. Anderson, Fleet Operations Support R. Pucci, Beaver Valley Power Station FirstEnergy Nuclear Operating Company United States
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PLAN TODAY FOR ALARA TOMORROW
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Actual/Forecast Dose ≤ 100% = A ≤ 110% = B ≤ 115% = C ≤ 125% = D
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Primarily a function of . . .
Low On-Line Dose Primarily a function of . . . Source Term dose rates Work Management number of workers duration of work
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Long-range Dose Reduction Plan
Over 120 initiatives covering … Administrative / ALARA Program Equipment & Component Modifications Source Term Reduction Worker Productivity Resulting in an anticipated rem (1.59 Sv) savings over a six year period
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Source Term (dose rates)
Unit 1 16 High Rad/Locked High Rad Areas 16 Hot Spots Few areas >1 mR/hr (0.01 mSv/hr) in walkways Unit 2 7 High Rad/Locked High Rad Areas No Hot Spots Few areas > 0.5 mR/hr (0.005 mSv/hr) in walkways
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Work Management Planning process is proceduralized
Utilize a 12-week planning process Radiological Risk Assessments Weekly meetings performed up to the week, followed by a post-work week critique meeting Report Card
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Work Management Typically complete ~ 12 work orders per week per unit
Corrective & elective work orders 2003: completed ~ 1,100 work orders 2004: completed ~ 1,800 work orders 2005: completed ~ 925 work orders Backlog reduction Worked off nearly 1,400 work orders
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2005 Work Example Job Estimate: 0.800 person-rem (8 person-mSv)
Replacement of two Liquid Waste pumps at Unit 1 Job Estimate: person-rem (8 person-mSv) System flushed with clean water Hot spots shielded Work relocated to the extent practicable ALL work planned and scheduled Final actual dose: person-rem (1.9 person-mSv) Total savings: person-rem (6.1 person-mSv)
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2005 Work Example Overhaul of High Head Safety Injection Pump at Unit 2 Original Job Estimate: person-rem (2.73 person-mSv) Revised Job Estimate: person-rem ( person-Sv) System flushed with “clean” water Job postponed for decay System cleaned with Alconox Hot spots shielded Work relocated to the extent practicable ALL work planned and scheduled Final actual dose: person-rem (0.73 person-mSv) 5.151 person-rem ( person-Sv) avoided 0.200 person-rem (2 person-mSv) saved
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Conclusion Long-term planning and initiatives
Good, ALARA-conscious work force Long-term planning and initiatives Proceduralized work management process Management commitment to excellence in ALARA and dose reduction
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