ML20196G538

Correction to SER Acceping Amends to Added Limiting Condition for Operation,Trip Setpoints & SR for Residual Heat Removal Pump Trip on Refueling Water Storage Tank level-low

ML20196G538
Person / Time
Site:	Diablo Canyon
Issue date:	06/25/1999
From:	NRC (Affiliation Not Assigned)
To:
Shared Package
ML20196G544	List: ML20196G538 ML20196H275
References
NUDOCS 9907010190
Download: ML20196G538 (1)

Text

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k UNITED STATES s

j NUCLEAR REGULATORY COMMISSION 2

WASHINGTON, D.C. 20085-0001

.....l SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION RELATED TO AMENDMENT NO.130 TO FACILITY OPERATING LICENSE NO. DPR-80 AND AMENDMENT NO.128 TO FACILITY OPERATING LICENSE NO. DPR-82 PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON NUCLEAR POWER PLANT. UNITS 1 ANQ2 DOCKET NOS. 50-275 AND 50-323 1

i 10 INTRODUCTION By letter dated July 30,1997, as supplemented by letter dated December 23,1998, the Pacific Gas and Electric Company proposed license amendments to change the Technical Specifications (TS) for Diablo Canyon, Units 1 and 2. The amendments will add a Limiting Condition for Operation (LCO), trip setpoints, and surveillance requirements for a residual heat removal (RHR) pump trip on refueling water storage tank (RWST) level-low. In conference calls on November 20,1997, March 4, July 10, and November 20,1998, and by letter dated December 23,1998, the licensee provided additionalinformation on the proposed TS changes.

i The December 23,1998, supplemental letter provided additional clarifying information, did not i

I expand the scope of the application as originally noticed, and did not change the staff's prooosed no significant hazards consideration determination published in the Federal Register on December 31,1997 (62 FR 68312).

The current RWST water level instrumentation which provides accident monitoring per TS 3.3.3.6 does not require verification of the automatic trip function of the RHR pumps on low RWST water level. In March 1997, in response to an NRC inquiry, the licensee determined that the existing RWST levelinstrumentation design was outside the design basis of the plant and a

]

Licensee Event Report, LER 97-005, was issued on April 1997. The licensee, in LER 97-005, i

also identified that TS did not address the automatic trip function of the RHR pumps. The licensee had resolved the deficiency of no automatic functions on low RWST level, in response f

to Generic issue 23, by adding a new RWST level-low instrumentation channel and making provisions to automatically trip the RHR pumps on low RWST level. The TS modifications will i

add the following items to RS 3/4.3.2, Engineered Safety Features Actuation System Instrumentation.

L 1.

Limiting Condition for Operation: Table 3.3-3, Functional Unit 9, Resident Heat l

Removal Pump Trip on Refueling Water Storage Tank Level-Low.

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2.

Trip Setpoints: Table 3.3-4, Functional Unit 9, Residual Heat Removal Pump Trip on H

I Refueling Wc.ier Storage Tank Level-Low.

9907010190 990625 PDR ADOCK 05000275 P

PDR t

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