ML20209C692

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Advises That Installation of Low Flow Alarm for RHR Pump Protection on or Before First Refueling Outage Should Be License Condition.Schedule Commitment from Licensee for Completing Installation Should Be Pursued
ML20209C692
Person / Time
Site: Diablo Canyon  Pacific Gas & Electric icon.png
Issue date: 01/17/1984
From: Houston R
Office of Nuclear Reactor Regulation
To: Novak T
Office of Nuclear Reactor Regulation
Shared Package
ML17083B484 List:
References
FOIA-86-197 NUDOCS 8402030068
Download: ML20209C692 (1)


Text

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UNITED STATES NUCLEAR REGULATORY COMMISSICN

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Docket flo. : 50-275/323 MEMORANDUM FOR: 6 , Assistant Director for Licensing Division of Licensing FROM: Robert W. Houston, Assistant Director for Reactor Safety, Division of Systems Integration

SUBJECT:

DIABLO CANYON UNITS 1 AND 2 - LOW PRESSURE INJECTION FLOW ALARM

Reference:

December 9, 1983 memo (Mattson to Eisenhut)

In the Diablo Canyon SER supplement No. 13, Section 6.3, dated April 2, 1981, the staff indicated that it required the licensee to provide an alarm to alert the operator to a degradation in ECCS during long term recirculation. A low flow alarm was stated to be an acceptable method to satisfy this concern and the staff determined that an alarm should be installed at the first refueling outage. Until then, procedures and dedicated operators were to be implemented during long term recirculation to manage and monitor ECCS performance.

During our recent investigation of the Diablo Canyon Allegation No. 45 we found no documentation to indicate that the licensee committed to this staff position, nor was there a license condition to formalize the staff position. In recent conversations with PG&E, we learned that PG&E has not made plans to purchase and install the low flow alarm, nor have any design efforts been conducted. In the reference memo we stated that to implement the staff position stated in SSER No. 13, the installation of a low flow alarm for RHR pump protection is being considered as a license cerdition in the Diablo Canyon full power license.

The purpose of this memo is to advise you that we have determined that the installation of a low flow alarm for RHR pump protection on or before the first refueling outage should be made a license condition for Diablo Canyon 1 & 2. We also request that DL pursue with the licensee a schedule commitment for accomplishing this installation at the earliest oossible time.

, [q _ h t $ t , u_n R. W. Houston, Assistant Director for Reactor Safety, DSL 3 cc: R. Mattson B. Buckley G. Knighton F. Rosa e W o2 o) oo(of d

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