ML102030462
| ML102030462 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 07/20/2010 |
| From: | Progress Energy Carolinas |
| To: | Office of Information Services |
| References | |
| FOIA/PA-2010-0209 | |
| Download: ML102030462 (29) | |
Text
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§ Storm Drain Stabilization Pond (SDSP) o Discharges to Nancy's Creek SDSP Atmospheric Releases due to Evaporation Protected Area
- Owner Controlled Area Progress Energy
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1977 - SDSP constructed from a spoil pond provide Brunswick Nuclear Plant (BNP) with the capability to meet EPA effluent storm water release standards 1983 - Issuance of RETS. Stabilization Pond identified as a liquid effluent release point.
o 1992 - The licensee identified the Stabilization Pond as a previously unrecognized release point for tritium.
- I Progress Energy
- 2006 - BNP began to analyze water in manholes for tritium and gamma emitters
- 2007 - Tritium was discovered in manholes in vicinity of Storm Drain Stabilization Pond
- Values were 75,000 pCi/I to 150,000 pCi/I
- 2007 Standing/Flowing water containing tritium was found on the areas outside of the SDSP dike some of which was flowing toward intake canal.
Values were 47,000 pCi/I to 880,000 pCi/I Progress Energy
WP-24<LLD 36,050 281,600 197,400 604,500 391,200
< LLD (Well) 93,410 60 166,800
< LLD (well) 180,400 804,100
<LL 793,600 882,400 342,400
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- Weekly-SDSP samples analyzed for tritium
- Monthly - Curies evaporated from SDSP calculated
- 21.80 Curies in 2008
- Annually - Dose to nearest member of the public (0.3 miles NW) in 2008
- 0.00667 mrem via inhalation
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Number Average Activity (pCi/L)
Number Activity Range (pCi/L)
MWPA-100C 356 MWPA-1 12C 10,500 MWPA-101C 3,390 MWPA-113C 405 MWPA-102C 5,040 MWPA-1 14C 597 MWPA-103C Non-detectable MWPA-1 15C 27,200 MWPA-104C 23,100 MWPA-1 16C Non-detectable MWPA-105C 3,320 MWPA-1 17C 4,450 MWPA-106C 535 MWPA-1 18C 546 MWPA-107C 3,030 MWPA-1 04B 27,300 MWPA-108C 353 MWPA-107B 44,700 MWPA-109C 435 MWPA-1 IIB 2,850 MWPA-110C, 373 MWPA-118B Non-detectable MWPA-111C 29,300
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- Continuing to monitor wells around SDSP
- Preparing to begin startup of extraction wells
- Continuing to monitor offsite surface water and assign dose accordingly o Continuing to monitor dose from airborne releases
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