ML20028D294

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Forwards LERs 82-157/03L-0 & 82-004/03L-0.Detailed Event Analysis Submitted
ML20028D294
Person / Time
Site: San Onofre  Southern California Edison icon.png
Issue date: 12/23/1982
From: Ray H
SOUTHERN CALIFORNIA EDISON CO.
To: Engelken R
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
Shared Package
ML20028D295 List:
References
NUDOCS 8301170295
Download: ML20028D294 (2)


Text

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  • RECEIvgg linc Southern California Edison CompanyI;y p S AN ONOF RE NUCLE AR GENER A TING S T A TlON ,

SG P.O. BO R 128 S A N C L EME N T E. C A LIF OR Nt a 92672 -

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ST A f TON M AN AGE 4 December 23, 1982 ~

1714) 492 7700 U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement

, Region V

1450 Maria Lane, Suite 210 Walnut Creek, California 94596-5368 Attention
Mr. R. H. Engelken, Regional Administrator

Dear Sir:

Subject:

Docket No. 50-361 and 50-362 30-Day Report Licensee Event Report No.82-157 (Docket No. 50-361)

Licensee Event Report No.82-004 (Docket No. 50-362)

San Onofre Nuclear Generating Station, Units 2 and 3 This submittal is in accordance with the reporting requirements of Section 6.9.1.13.b of Appendix A to Facility Operating Licenses NPF-10 and NPF-15. It describes a reportable occurrence involving Limiting Condition for Operation (LC0) 3.7.5 on the shared Units 2 and 3 Control Room Emergency Air Cleanup System (CREACUS).

Surveillance Requirement 4.7.5.d requires that a representative sample of the activated charcoal absorber be analyzed for methyl iodine removal

' capability after each 720 hours0.00833 days <br />0.2 hours <br />0.00119 weeks <br />2.7396e-4 months <br /> of operation. The required samples were removed within the specified interval on October 25, 1982, and forwarded to American Air Filter for laboratory analysis on that date. The results of an analysis performed on November 10, 1982, were received and evaluated by Health Physics on November 24, 1982. Since the laboratory testing indicated a methyl iodine penetration of greater than 1% on the samples i

provided, Train A of CREACUS was declared inoperable on that date, and action to completely replace all charcoal in the E418 filter assembly was initiated.

Replacement of charcoal and performance of the in-place testing of Surveillance Requirement 4.7.5.g was completed on November 29, 1982, when Train A was again declared operable.

1 8301170295 021223 ~

PDR ADOCK 05000361 y_q5

Mr. R. H. Engelken December 23, 1982 The charcoal absorbers of the redundant train remained operable throughout the entire period of sampling and analysis, and thereby provided adequate protection to Control Room personnel in the event of an accident. The health and safety of the public, therefore, was not compromised by the Inoperability nf the ~lrain A charcoal absorber.

l I Since degradation of the iodine removal capability of activated charcoal is anticipated, end since compliance'with Surveillance Requirement 4.7.5.d is intended to detect such degraded charcoal as it did in this ca'.0, corrective action to prevent recurrence is not being planned.

Completed Licensee Event Report (LER) forms, one for each unit, are attached.

If there are any questions regarding the above, please contact me.

Sincerely, HB ry /11t%w,

Enclosures:

LER 82-157 (Unit 2)

LER 82-U04 (Unit 3) cc: A.E. Chaffee (USNRC Resident Inspectar, San Onotre, Units 2 and 3)

U.S. Nuclear Regulatory Commission Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Office of Management Information & Program Control (MIPC)

Institute of Nuclear Power Operations (INP0)

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