ML13331B368
| ML13331B368 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 05/05/1980 |
| From: | Curran J SOUTHERN CALIFORNIA EDISON CO. |
| To: | |
| References | |
| NUDOCS 8005140433 | |
| Download: ML13331B368 (2) | |
Text
REGULATUR NFORMATION DISTRIBUTIUN *IEM (RDluS)
ACCESSION NBR:8005140433 DUCDATE: 80/05/05 NOTARIZED:
NO UCKET #
FACIL:50-206 San Onofre Nuclear Station, Unit 1, Souther Calitorn 00002U6 AUTH.NAME AUTHUR AFFILIATION CURANJ.M.
SoutherCairnie Edison Co.
RECIPNAME RECiPIENT AFFILIATION
SUBJECT:
RO;on 800425,during filling of refueling canal from refueling water storage tunkrinadvertent contamination o.f primary makeup.tank occurredresultinq in erroncous boro-n analysisCaused by leek in seal flushing line check valve.
Dl$TRIBUTION CODE: MU078 COPIES RECEIVED:LTR ENCL SIZE:
TI.TLE.
LER'0ackf1't)
NOTES:----------------
RECIPIENT COPIES RECIPIENT COPIES ID CODENAME LTTR ENCL
- 11) CidiE/NAME LIYR ENCL INTERNAL: 0 1
02 NRC PDR 1
04 I2 AEQI0 1
4 bERLINGER,C, 1
- HANAUERS, 1
EXTERNAL: 03 LPDR 1
I NSIC 1
MAY 1 5 1gSB TOTAL NUM3ER OF COPIES REQUIRED: LJTR 10 ENCL K
j 80 051404 Southern C //for/e E7d/sron Company C
RAW OFFLSR6W ACL4'AR t#4 4W4Ual AVA.74pt V.11'. pop, VRas:
MY $. 1980.
VS. Nuclear Regulatory-Comission Region V Suite 2020.Walut creek Plaza 1990; North.Califorte 819V4.
h'Alent Creek, California 94596.
Attation:
Mr. R. H. Engelken, Director Gentlement:
DOQCKET No.. 50- 200 SAN ONFR M UIT V' This letter d~scribes an ocourrevnce involng inadvertetnt contanination of the. Primary M'akeup Tank and. oonseqp*ent erronpovg boron - n ysfi, (ft ApHI: 25, 1980 dluring: filling, of' the re1fse1Tho #cnal-1"rwmvthe refvaling. water storage tank'-# lekae occurred. hrugh;, o vall 'il(Ishiig, libe (eheo-k valve from-the refueling water pump discharg
-~kinothe priviary. maikeup Ivan Wa~r from the primary toakeup tank, 10 W)l 1zed. to.perfrm. b~ron analy-s1t on the refueling canal, refueling water storage tonk And other On t 1y 3's 1980, it' was d4ot.rmi hed;that the primp ry makeup tank contLa inod:
About 27. ppm boron.
This result~d io' an error Qf! about, 650 ppm high 'in Mhe boof analysis Of~ the rpfuplinq IcatalL "'Prior, t theditcovery of the problem the bqron concentration ih the refVeling' anal was tought to be 3672ppm A re-analysi tf ater free of boron deteroined. that actual: boron concentration Wa~ ll 11iIPpmA The, 'lowest buron concentratio neatu1red was :3109 ppm compared to the minimovu refuelin. conc(entration of-Technital-Spec if$1oti on 3.8A,.3 of, 2900 ppmo, A'
compt report un thit yatter together with a Litensee Event Report will1 be forwardod: withih. 14 days.
Sthecerel~y
?4..M. Curran Plont Monager