ML13331B367
| ML13331B367 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 05/05/1980 |
| From: | Curran J SOUTHERN CALIFORNIA EDISON CO. |
| To: | |
| References | |
| NUDOCS 8005140404 | |
| Download: ML13331B367 (2) | |
Text
REGULATOR@ONFORMATION DISTRIBUTION *TEM (RIDS)
ACCESSION NBR:8005140404 0OCDATE: 80/05/05 NOTARIZED:
NO DOCKET #
FACIL:5P-206 San Onofre Nuclear Station, Unit 1, Southern Californ 05000206 AUTHQNAME AUTHOR AFFILIATION' CURRANJM.
Southern Cafifornia Edison Co.
"RECIP.NAME RECIPIENT AFFILIATION
SUBJECT:
RO:during 1980 inservice insp programrdye penetrant testing was performed on each reactor coolant pump flywheel bore &
keyways.Linear indications found on bore of pumps A&B flywheels,LER willibe issued following investigation.
DISIRIBUTION CODE: M007S COPIES RECEIVED:LTR ENCL SIZE:
TITLE: LER tBackfji)
NOTES:
RECIPIENT COPIES RECIPIENT COPIES 10 CODE/NAME LTTR ENCL I) CODE/NAME LTTR ENCL INTERNAL: 0 1
02 NRC POR 1
04 I&E 2
AEUD 1
BERLINGERC.
1 HANAUERS.
1 MPA 1
EXTERNAL: 03 LPDR 1
NSIC 1
7AY 15 1980 TOTAL NUMBER OF COPIES REQUIRED:
LTTR 10 ENCL 4-
SouMrn oa//fornia Ed/son Cmp
-54 laAfTOtOtt
~Atafe O.W AIAAwS ST19)
May
- o. 1980 U. S. Nuclear Regulatory-Comission Rtegion.YV.
Office of Inspect4on and Enforcement Walnut creek Plaza, Suite 202 Walnut Creek, California 94596 Attentionw:
Mr..M H# Engelkent. Director
Dear Sk:
Docket No. SPO.06.
San Onofe,- UtIt 1 This. letter (Jsoribes inspection reuits. ivolvi4q the reactor coolant pumps A and, B flywheels.
During our 1980'loIservfie Inspection program dye penetrant tesing: was perfeymed. on eac reactor coolant pump: flywheel bore ond!
keyways.
This examination-revealed line&r 1hdications on the bore of the K and B pump, flywheel.. One ihdIcation on flywheel A i approxi eately 1'1/2 thch long and runs vertical: t th plane of the fl heel.
The indications in-B are of a similar nature to thoe in A. The other iodiaetions are dcumferential at the mid' plane of the flywheel.
We have investigated the extent of the, idications in A flywheel and found that the vertical 6dication origthated In o-weldthe slog hol.
This hole was loeated near the mid plane of the flywheel and was found to be 1 inch deep. The cfumferenfabl-indications were also removed and found to be approximaely. 1/2 inch deep The-infonnation contaihed herei is preliminary.in naturep.
A.more dtailed description with on LER will be issued as soon as investi ations in-progress are completed (approximately.twto.weeks)4.
These investigatiOns 434 include corrective action..
Should youwhave any-questions regarding.this matter,, please contact meq S1hcerely4 J. ML Curran Plant.M'anager JiRT dha