ML18095A344

From kanterella
Jump to navigation Jump to search
Provides Written Notification Re Change in Calculated Peak Clad Temp,Per 900606 Verbal Notification
ML18095A344
Person / Time
Site: Salem  PSEG icon.png
Issue date: 07/09/1990
From: Crimmins T
Public Service Enterprise Group
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NLR-N90139, NUDOCS 9007170140
Download: ML18095A344 (2)


Text

' Public Service Electric and Gas Company Thomas M. Crimmins, Jr. Public Service Electric and Gas Company P.O. Box 236, Hancocks Bridge, NJ 08038 609-339-4700 Vice President - Nuclear Engineering fJUL og 1990 NLR-N90139 United states Nuclear Regulatory Commission Document Control Desk Washington, DC 20555 Gentlemen:

CALCULATED PEAK CLAD TEMPERATURE SALEM GENERATING STATION UNIT NOS. 1 AND 2 DOCKET NOS. 50-272 AND 50-311 On June 6, 1990, Public Service Electric and Gas Company (PSE&G) verbally notified NRC of a change to the calculated Peak Clad Temperature (PCT) for Salem Unit Nos. 1 and 2. The purpose of this communication is to provide the written notification required under 10CFR50.46. Although Westinghouse has determined that the change is not due to a model error, the magnitude of the change exceeds the NRC reporting threshold and, as such, is being reported by PSE&G as a significant change in calculated PCT.

PSE&G was notified by Westinghouse that a 95°F PCT penalty was being imposed on the Salem Unit Nos. 1 and 2 Small Break LOCA Analysis (SBLOCA) due to an inconsistency between the assumed purge time of the higher enthalphy main feedwater (FW) by the lower enthalpy auxiliary feedwater (AFW). The inconsistency is attributed to plant specific piping arrangements which result in longer purge times than those used in the original analysis.

The present calculated PCT for the Salem unit's SBLOCA scenario, including the identified penalty, is 1736 °F for Salem Unit No. 1 and 1783 F for Salem Unit No. 2. The present large break LOCA PCT is unaffected by this inconsistency. The present large break LOCA PCT for both Salem Unit Nos. 1 and 2 is 2097°F.

The Salem Updated Final Safety Analysis Report establishes a 2200°F limit on PCT consistent with the requirements of 10CFR50.46. The calculated PCT for Salem Unit Nos. 1 and 2 remains well below this limit after inclusion of the penalty for feedwater purge time. As such no corrective action is required at this time.

(

I

\

)

Document Control Desk 2 '.JlJL o9 fgg[j NLR-N90139 Should you have any questions, please feel free to contact us.

Sincerely,

£/If_~~

c Mr. J. c. stone Licensing Project Manager Mr. T. Johnson Senior Resident Inspector Mr. T. Martin, Administrator Region I Mr. Kent Tosch, Chief New Jersey Department of Environmental Protection Division of Environmental Quality Bureau of Nuclear Engineering CN 415 Trenton, NJ 08625