ML20196K554

Forwards Request for Addl Info Re 10CFR50.46(A) Annual Rept. Note to File for TACs MA5336 & MA5337 Supercedes & Closes TACs MA1597,MA1598 & MA4426

ML20196K554
Person / Time
Site:	Quad Cities
Issue date:	06/10/1999
From:	Pulsifer R NRC (Affiliation Not Assigned)
To:	NRC (Affiliation Not Assigned)
References
TAC-MA5336, TAC-MA5337, NUDOCS 9907090070
Download: ML20196K554 (2)

Text

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l June 10,1999 l Docket Nos: 50 254 and 50-265 Note to Fi:e:

From Robert M. Pulsifer, Project Manager

' Division of Project Management Office of Nuclear Reactor Regulation

SUBJECT:

10 CFR 50.46(A) ANNUAL REPORT (TAC Nos. MA5336 AND MA5337)

The attached enclos0re was faxed to Comed Quad Cities site Regulatory Assurance group on May 20,1999 to request information to help the staff in the review of the Quad Cities 10 CFR 50.46(a) Annual Report dated April 14,1999. This is to facilitate further discussions to aid the staff in the understanding of the April 14,1999 submittal. The licensee was requested.and they agreed to provide a written response by June 31,1999.

This Note to File for TAC Nos. MA5336 and MA5337 supercedes and closes TAC Nos MA1597, MA1598, and MA4426, CC: Docket Files PUBLIC i

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Enclosure 1

1. Please provide more information on how the penalties were detehnined for the following assessments repor1ed in your April 14,1999,10 CFR 50.46 Annual Report. Please provide this information for both the GE and the Seimens fuels.

a) Delay in Low Pressure Coolant injection (LPCI) from 48 seconds to 75 seconds der Loss of Coolant Accident (LOCA) initiation (Note 1) b) Extended Operating Domaln/ Equipment Out Of Service (EOD/EOOS) (Note 2) l c) Core Spray (CS) Tee Box repair including CS piping leakage (Note 8) ' ,

I LPCI and CS injection pressure permissive (Note 14) s' d) e) LPCI, High Pressure Coolant injection (HPCI) and CS reduction due to minimum flow bypass (Note 15) f) Jet Pump Riser Flaw Penalty (Note 30)

2. Please justify that the SAFER /GESTR methodology applies to the current Quad Cities Units 1 and 2 configurations, including all assessments added to the reference peak claddin'g temperatures, with respect to the following limitations and/or assumptions in the approved SAFER /GESTR methodology and staff safety evaluation for this methodology; a) The ECCS flow used in the analyses conservatively bounds the actual minimum ECCS flows at the two units b) The upper bound PCTis below 1600*F

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