ML20151U924
| ML20151U924 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 06/09/1977 |
| From: | Bidinger G, Higginbotham L, Roy G NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | |
| References | |
| PNO-77-100, NUDOCS 9809110233 | |
| Download: ML20151U924 (2) | |
Text
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U PRELIMINARY NOTIFICATION
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June 9, 1977 Y
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PRELIMINARY NOTIFICATION.0,F EVENT OR UNUSUAL'OCCURFl2 ICE--PNO 100 This preliminary notification constitutes EARLY notice of an event of POSSIBLE safety or public interest sienificance.
The information presented is as initially received without verification or evaluation and is basically all that is known by IE staff on this date.
l Facility:
Beaver Valley Unit 1 (DN 50-334) g Shippingport, Pennsylvania Subfect:
CONTAMINATION OF PLANT DOMESTIC WATER l
l At 3:30 p.m., June 8, 1977, makeup water from a Primary Water (PW)
' Storage Tank contaminated the plant's water treatment system which provides in plant domestic water. The PW Storage Tank contains reactor coolant water which has been purified through evaporation and demineralization (removing radioisotopes other than tritium).
The plant relies solely on its own water supply and. sewage systems.
The PW Storage Tank water contained 1x10-2 uCi/ml tritium but no other radioactive isotopes. The plant domestic water was contaminated to a level of 7x10-4 uCi/ml tritium (10 CFR 20 unrestricted limit isffx10-3 uCi/ml). No release to the environment above maximum permissible concentrations occurred.
Approximately 15,000 gallons of water were lost from the PW Storage
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.4 Tank during the period 3:30 p.m. to 8:15 p.m.
The cause of the loss
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t was valving errors.
Some of the 15,000 gallons also flowed to other
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systems such as demineralized water storage tanks and the water treat-ment clarifier.
O A
Af ter identifying the event the licensee posted all domestic water out-O lets (drinking fountains and lavoratories). Union representatives o'f 2
1 construction workers who were on site during the period of the event were notified and a meeting with construction personnel is planned. In
,' 4 addition, urine samples will be taken from personnel invol'ted and analyzed for tritium.
Media lnterest is expected because of the involvement of plant and construction personnel in the event. The Commonwealth of Pennsylvania has been informed. A press release is not planned by the lic,ensee.
Region I is considering a press release.
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CONTINUED e
e-e 9809110233 770609 PDR I&E PNG-77-100 PDR W
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w4hd Page 2 PNO-77-100 Continued June 9, 1977 NRC, Region I (Philadelphia) received notification of this occurrence by telephone from a Region I Inspector (Radiation Specialist) on-site at 9:30 a.m., June 9, 1977.
The event was discussed with the Chief Engineer, Beaver Valley Power Station at 11:00 a.m.
Further informa-tion is being obtained.
Contact:
- GHBidinger, IE x27353 LBHigginbotham, IE x27347 GWRoy, IE x27261 i
Distribution: Transmitted H St Chairman Rowden C. C. Kammerer, CA G. F. Murphy, JCAE Commissioner Kennedy S. J. Chilk, SECY H. H. Whiteside, SCNR Commissioner Gilinsky H. R. Myers, HCEE Transmitted: MNBB P Bldg SS Bldg L. V. Gossick, EDO E. G. Case, NRR C. V. Smith, NMSS S. H. Hanauer, EDO J. A. Harris, PA W. G. Mcdonald, MIPC Luge (MAIL)
E. Volgenau, IE R. G. Ryan, OSP T. J. McTiernan, OIA Region H. K. Shapar, ELD i
j PRELIMINARY NOTIFICATION I
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