ML13308B521
| ML13308B521 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 01/17/1977 |
| From: | Ottoson H SOUTHERN CALIFORNIA EDISON CO. |
| To: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| IEC-76-06, IEC-76-6, NUDOCS 8103110097 | |
| Download: ML13308B521 (2) | |
Text
Southern California Edison Company SAN ONOFRE NUCLEAR GENERATING STATION P.
- 0.
BOX 128 SAN
- CLEMENTE, CALIFORNIA 92672 January 17, 1977 U. S. Nuclear Regulatory Commission Region V.
Suite 202 Walnut Creek Plaza 1990 North California Blvd.
Walnut Creek, California 94596 Attention:
Mr. R. H. Engelken, Director DOCKET NO.
50-206 SAN ONOFRE - UNIT 1 Gentlemen:
Our response of December 23, 1976 to IE Circular 76-06 indicated that any adverse findings as a result of our inspection commitments in that corres pondence would bereported within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Accordingly, we wish to inform you of an apparent through-wall flaw located in a portion of the containment spray line.
The subject line is a 6-inch schedule 10 ASTM 312 Type 304 stainless steel line. This line is also used to fill the refueling cavity during refuel ing outages.
A visual inspection of the containment spray line revealed an accumu lation of boric acid crystals on a portion of the line. Dye penetrant examina tion of the suspect area revealed the presence of both linear and rounded indications.
We intend to perform further examination and inspection on this line in an effort to determine the extent of the problem and to initiate appropriate corrective action prior to the plant's return to service in mid-February, 1977.
A complete report on this matter together with a Licensee Event Report form will be forwarded within two weeks.
Sincerely, uperintendent GTM/yc
~IO5,O077
Southern California Edison Company S-AMd f1&
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S:l Its SAW LtaVLse'Z CA&tePeWk0A 996i9.
January 17, 1977 U. S. Nuclear Regulatory Colonission Region V Suite 202 Walnut Creek Plaza 1990 North California Blvd.
Walnut Creek, California 94596 Attention: Mr. R. H. Engelken. Director DOCKET NO. 50-206 SAN ONOFRE - UNIT 1 Gentlemen:
Our response'of December 23, 1976 to E Circular 76-06 indicated that any adverse findings as a result of our inspection Citents in that corres pondence would be reported within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. Accordingli, we wish to inform you of an apparent through-wall flaw located in a portion of the contaient spray li ne.
The subject line is a 6-inch schedule 10 AST1 312 Type 304 stainless steel line.
This line is also used to fill the refueling cavity during refuel ing outages.
A visual inspection of the contaimient spray line revealed an accumu lation of boric acid crystals on a portion of the line.
DYe penetrant examina tionof the suspect area revealed the presence of bth linearp and rounded indications.
We intend to perform further examination and inspection on this line in rn effort to determine the extent of the problem and to initiate appropriate corrective action prior to the plant's return to service in mid-February, 1977.
A complete report on this mnatter together with a Licensee Event Report form wvill be forwarded within two weeks.
Sincerely, H..
ttos n Superintendent sTMye REGION Y IWUPET INN~RtA~