ML20069M295

Proposed TS Figure 3.4-4a, Normal PORV Pressure Relief Setpoint Vs RCS Temp for Cold Overpressure Protection Sys Applicable Up to 32 EFPY (Unit 1)

ML20069M295
Person / Time
Site:	Braidwood
Issue date:	06/14/1994
From:	COMMONWEALTH EDISON CO.
To:
Shared Package
ML20069M290	List: ML20069M289 ML20069M295
References
NUDOCS 9406210279
Download: ML20069M295 (5)

Text

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ATTACHMENT B MARKED UP PAGES FOR PROPOSED CHANGES TO APPENDIX A TECHNICAL SPECIFICATIONS OF FACILITY OPERATING LICENSES NPF-72 and NPF-77 BRAIDWOOD STATION UNIT 1 REVISED PAGES:

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4 FIGURE 3.4-4a NOMINAL PORY PRES 8URE RELIEF SETPOINT VERBUS e

RCS TEMPERATURE FOR THE COLD OVERPRES8URE PROTECTION SYSTEM APPLICABLE UP TO 32 EFPY (UNIT 1)

BRAIowoOD - UNITS 1 & 2 3/4 4-40 AMENDMENT NO.

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i Westinghouse Energy Systems Box 355 Pittsbu@ PennsyNania 15230 0355 Electric Corporation CCE-94-232 June 6,1994 Mr. M. A. Gorski Commonwealth Edison Company Braidwood Nuclear Station Rural Route #1, Box 84 Braceville, IL 6(M07 Commonwealth Edison Company Braidwood Revision to Braidwood 1 LTOPS for Caosule U

References:

1) Westinghouse letter CCE-92-193

Dear Mr. Gorski:

A detailed review of the basis for development of the maximum allowable PORV setpoint curve for LTOPS in Figure 3 of Reference 1 revealed that the curve accounted for a 27 degrees F temperature uncertainty but neglected to account for the 50 degrees F thermal transport effect from the heat injection transient. To correct this situation, the attached curve has been generated to account for all temperature effects. Figure A is provided to illustrate the shifting of the points and is not intended for submittal to the NRC. Figure 3 from Reference 1 which is suitable for NRC submittal has been j

regenerated and is also attached.

j Very truly yours, WESTINGHOUSE ELECTRIC CORPORATION W&

B. S. Humphries, Manager Commonwealth Edison Project

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Operating Plant Programs

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