ML20066F785

RO 82-127:on 821103,error Discovered in Temporary Mod on Low Level Cutoff Controls Made to Spray Chemical Tank (T-105).Error Would Have Prevented Sys from Delivering Full Required Amount of Sodium Hydroxide Solution

ML20066F785
Person / Time
Site:	San Onofre
Issue date:	11/05/1982
From:	Ray H SOUTHERN CALIFORNIA EDISON CO.
To:	Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
RO-82-127, NUDOCS 8211190177
Download: ML20066F785 (1)

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Novenber 5,1982 U. S. Nuclear fiegulatory 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

Subject:

Docket No. 50-361 Prompt Report '

Licensee Event Report No.82-127 San Onofre Nuclear Generating Station, Unit 2 Pursuant to Appendix A Technical Specification 6.9.1.12b to Operating License NPF-10 for San Onofre Unit 2, this submittal provides the t written confirmation of our prompt notification to the NRC on November 3,1982 of a reportable occurrence involving the Iodine Removal System (IRS).

! On November 3,1982, an error we.s discovered in a temporary modification on low level cut-off controls made to the Spray Chemical Tank (T-105) on October 19, 1982.~ This error would have prevented the system from delivering the full required amount of NaOH solution into the Containment l Spray System (CSS). The public health and safety was not affected by this occurrence since the CSS was operable at all times and the IRS was i operable at a reduced efficiency, assuming a design basis event.

A 14-day follow up report and copy of Licensee Event Report (LER)82-127 will be submitted by November 17, 1982.

If there are any questions, please contact me.

Sincerely, H0Ay /num4 cc: A. E. Chaffee (USNRC Resident Inspector, San Onofre Unit 1) 8211190177 821105 Irm

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