ML20005D697

Special Rept:On 891127,wide Range Gas Monitor Removed from Svc for Performance of 18-month Channel Calibr Surveillance. Monitor Will Be Returned to Svc by 891216 Following Completion of Satisfactory Channel Calibr

ML20005D697
Person / Time
Site:	San Onofre
Issue date:	12/11/1989
From:	Nandy F SOUTHERN CALIFORNIA EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 8912140179
Download: ML20005D697 (1)

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gg Southem Califomia Edison Company 23 PARKER STREET IRVINE, CALIFORNIA 92718 December 11, 1989-

-,u~.e/oi"~7t.Ecr~.i~o n U'[." ." loo U. S. Nuclear Regulatory Commission Document Control Desk-Washington, D.C. 20555-

Subject:

Docket No. 50-362 Special Report San Onofre Nuclear Generating Station, Unit 3

.The purpose of this letter is to provide the Special Report required by Technical Specification (TS) 3.3.3.1, Table 3.3-6, Action 19, of Facility Operating License NPF-15 for San Onofre Nuclear Generating Station, Unit 3,

-involving the Condenser Evacuation System Noble Gas Activity Monitor being out

of service for greater than 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />.

On November 27, 1989, with Unit 3 at 100% power, Wide Range Gas Monitor

~3RI-7870 was removed from service for the performance of the 18-month channel-calibration surveillance required by TS 4.3.3.1, Table 4.3-3. Since redundant monitor _3RI-7818 was inoperable, Actions 36, 37 and 40 of Limiting Conditions for Operation (LCO) 3.3.3.9 were entered. In addition, the preplanned alternate method of monitoring required by LCO 3.3.3.1 Action 19 was implemented.

It is anticipated that 3RI-7870 will-be returned to service by December 16, 1989 following completion of satisfactory channel calibration. Since the preplanned alternate method of monitoring noble gas at the condenser evacuation system discharge was maintained, the health and safety of plant

. personnel or the public was not affected. If you require any additional information, please advise.

Very truly yours, j /

cc: J. B. Martin (Regional Administrator, USNRC Region V)

C. W. Caldwell (USNRC Senior Resident Inspector, Units 1, 2, and 3)

Institute of Nuclear Power Operations (INP0) i 8912140179a891211 PDR ADOCK 05000362

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