ML13331B390
| ML13331B390 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 05/14/1980 |
| From: | Curran J SOUTHERN CALIFORNIA EDISON CO. |
| To: | |
| References | |
| NUDOCS 8005280619 | |
| Download: ML13331B390 (2) | |
Text
REGULATORY INFORMAllON DISTRIBUTION SYSTEM (RTS)
ACCESSION NBR:8005280619 0CDATE: 80/05/14 NOTARIZED; NO DOCKET #
FACIL:50-206 San.0nofre Nuclear Station, Unit 1, Southern Californ 05000206 AUTH.NAME AUTHOR AFFILIATION CURRANJM.
Southern California Edison Co, RECIP.NAME RECIPIENT AFFILIATION
SUBJECT:
RO:during surveillance testingrmain feedwater piping snubber
& main steam piping snubber failed functional testing.Caused by hydraulic fluid leakage & locking out on piston rod assemblyvrespectively.Addl functional testing underway, DISTRIBUTION CODE: M007S COPIES RECEIVED:LTR ENCL J SIZE-.
TITLE: LER (6ackfit)
NOTES RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL INTERNAL: 0 1
02 NRC PDR 1
1 04 I&E 2
AEOD 1
1 BERLINGERC, 1
HANAUERPS, 1
1 MPA 1
1 EXTERNAL: 03 LPDR 1
NSIC 1
MAY 2 9 19G TOTAL NUMBER OF COPIES REQUIRED: LTTR 10 ENCL WA
Southern Callforn/a Ed/son Company SA QMOUSt 5C4.sLAR
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P1.
pQA law SAW CLWMEETU. CA1tPOUNIA 92G98 Kay 14, 1980
- u. S. Nuclear Regulatory Comnission Office of Inspection and Enforcoent Region V 1990 North California Boulevard Suite 202, Walnut Creek Plaza Walnut Creek, California 94596 Attention: Mr. R. H. Engelken, Director DOCKET No. 60*206 SAN ONOFRE - UNIT I
Dear Sir:
This letter describes a reportable occurrence as defined In Section 6,9.2.a(9) of Appendix A to the Provisional Operating License DPR-13.
During surveillance testing two snubbers located inside containment failed functional testing. The first, a main feedwater piping snubber, failed due to eKcessive hydraulic fluid leakage around the piston rod seal.
The second, a main steam piping snubber, had failed threads and a locking nut on the piston rod assembly. In accordance with Technical Specification 4.14, additional functional testing has been initiated.
A complete report on this matter, together with a Licensee Event Report, will be forwarded to your office within two weeks.
Sincerely, J.
M4.
Curran Plant Manager MPS:dh 8005 280 to'l