ML20202F704

Special Rept:On 990106,SCE Began to Modify 2RT-7865.2RT-7865 to Allow Monitor to Provide Input to New Radiation Monitoring Data Acquisition Sys.Monitor Found to Exceeds 72 H Allowed Bt LCS 3.3.102.Alternate Monitoring Established

ML20202F704
Person / Time
Site:	San Onofre
Issue date:	01/21/1999
From:	Scherer A SOUTHERN CALIFORNIA EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9902040144
Download: ML20202F704 (1)

Text

_____

SOUIHiRN CAtIFORNIA A. Edwcrd Sehe;rr g

Manager of l

Nudear Regulatory Affairs An WISON INTip.4TIOy Al? Conmany January 21,1998 U. S. Nuclear Regulatory Commission Document Control Desk Washington, D.C. 20555

Subject:

Docket 50-362 Special Report San Onofre Nuclear Generating Station, Unit 3

Reference:

Licensee Controlled Specification 3.3.102, " Radiation Monitoring instrumentation (RMI)"

Gentlemen:

This letter provides a Special Report to the NRC in accordance with Ucensee Controlled Specification (LCS) 3.3.102. This LCS requires Southem Califomia Edison (SCE) to maintain two Plant Vent Stacks Wide Range Noble Gas Monitor channels (2RT-7865 and 3RT-7865) operable when either Unit is operating in Modes 1 - 3. When two Wide Range Monitor channels are not restored to operable status within 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br />, a Special Report must be submitted within the next 14 days.

[

On January 6,1999, at 0523 PST, with Unit 2 in a refueling outage, SCE began to modify 2RT-7865 g

to allow this monitor to provide input to the new Radiation Monitoring Data Acquisition System. To implement this change, SCE was required to remove 2RT-7865 from service. The monitor is scheduled to retumed to service prior to MODE 4 entry (currently forecast for February 16,1999) which exceeds the 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> allowed be LCS 3.3.102. In the interim, an attemate method of monitoring was established as required by the LCS.

This letter contains no new commitments. If you require any additionalinformation, please so advise.

Sincerely, X

cc:

E. W. Merschoff, Regional Administrator, NRC Region IV J. A. Sloan, NRC Senior Resident inspe: ir, Units 2 and 3 J. W. Clifford, NRC Project Manager, San Onofre Units 2 and 3 p

Institute of Nuclear Power Operations (INPO) 9902040144 990121 F

PDR ADOCK 05000362i

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P, O. Ikw 128 San Clemente, C^ 92674-0128 949-368-750I

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