ML13316B796
| ML13316B796 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 10/21/1980 |
| From: | Cillis M NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | |
| References | |
| PNO-V-80-074A, PNO-V-80-74A, NUDOCS 8010270538 | |
| Download: ML13316B796 (1) | |
Text
PREL I 1ARY NOTF CATTION PRELI MI NARY NOT IFT C TI OF EVENT OR UNUSUAL OCCURRENCE PNO-V 74A October 21, 1980 This orIiminar' notification constitutes EARLY notica o events of POSSBLE safezy or oublic intzrest sianificenc.
Te information Drsente is as initiall rceived witcout verification o eva tfU n anZ is basica[y a that is ncn ;
b i staff on this date.
FACILITY:
Southern California Edison Company San Onofre Nuclear Generating Station Unit 1 San Clemente, CA -
Docket No. 50-206
SUBJECT:
EVALUATION OF UNMONITORED, POTENTIALLY RADIOACTIVE LIQUID WASTE RELEASE UPDATE ON PRELIMINARY NOTIFICATION 80-74 ISSUED ON OCTOBER 10, 1980.
The licensee's evaluation of the reported potential radioactive liquid waste release of Iodine 131 activity discovered in the normally non-radioactive yard drain sump on October 8, 1980 revealed the source of activity was most probably attributed to a biologicial excretment from a worker undergoing medical treatment. It was reported that the sewage treatment system had overflowed into the yard drain system after failure of the yard sewage discharge system to operate properly.
Daily analysis of water samples taken from the sump during discharge operations between October 9 and 17, 1980 were performed by the licensee. Maximum Iodine 131 activity levels of 3.8E-7 uCi/ml initially reported on October 9, 1980 decreased to less than the minimum detectable activity (MDA) levels of < 8.4E-8 uCi./ml by October 16, 1980. A sample analyzed on October 17, 1980 was also reported as less than MDA. No other radionuclides were identified in any of the samples analyzed.
The licensee reported a total of 1.6E-4 curies of Iodine 131 was released during the period of October 8 through 15, 1980. The licensee reported a program for performing weekly analysis of the yard drain sumps effluents has been implemented.
This Preliminary Notification is issued for information only. No further licensee action is expected.
Media interest is not expected. Neither the licensee nor the NRC plans to issue a news release. Region V (San Francisco) originally received notification of this occurrence from the Resident Inspector at 10:00 A.M. on October 10, 1980.
CONTACT: M. Cillis, 463-3747 Distribution:
Transmitted H. St./U Chairman Ahearne Commissioner Hendrie S. J. Chilk, SECY Commissioner Gilinsky Commissioner Bradford C. C. Karnerer, CA Commissioner Kennedy ACRS (For Distribution)
Transmitted:
P. Bldg IE:XOOS 3 (IE:HQ Dist)
W. J. Dircks, EDO H. R. Denton, NRR C. Michelson, AEOD R. H. Volmer, NRR Landow (6 min/oace)
J. J. Fouchard, PA R. J. Mattson, NRR
. J. Cummings, CIA N. M. Haller, MPA D. F. Ross, NRR R. G. Ryan, SP D. Eisenhut, NRR IMAIL H. K. Shapar, ELD S. H. Hanauer, NRR R. linogue, SD IE
- XOS Willste Bld.
-cument Mgt. Br. (For PDR/LPOR)
J. G. Davis, NMSS Regional Offices /
R. J. Budnitz, RES RV Form 1
PRELIMINARY NOTIFICATION 8010270