ML19257A566

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Requests Tech Spec Revisions to License Re Operability Test Requirements for RHR Svc Water Pumps.Change Corrects Error in Required Pump Discharge Pressure.Tech Specs Encl
ML19257A566
Person / Time
Site: Brunswick  Duke Energy icon.png
Issue date: 12/31/1979
From: Utley E
CAROLINA POWER & LIGHT CO.
To: Ippolito T
Office of Nuclear Reactor Regulation
Shared Package
ML19257A567 List:
References
GD-79-3306, NUDOCS 8001040638
Download: ML19257A566 (2)


Text

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e Carolina Power & Light Company December 31, 1979 File: NG-3514(B) Serial: CD-79-3306 Office of Nuclear Reactor Regulation ATTENTION: Mr. T. A. Ippolito, Chief Operating Reactors Branch No. 3 United States Nuclear Regulatory Commission Washington, D. C. 20555 BRUNSWICK STEAM ELECTRIC PLANT UNIT NOS. 1 AND 2 DOCKET NOS. 50-325 AND 50-324 LICENSE NOS. DPR-71 AND DRP-62 REQUEST FOR LICENSE AMENDMENT RHR SERVICE WATER PUMP DISCHARGE PRESSURE

Dear Mr. Ippolito:

In accordance with the Code of Federal Regulations, Title 10, Part 50.90 and Part 2.101, Carolina Power & Light Company (CP&L) hereby requests revisions to the Technical Specifications for itr Brunswick Steam Electric Plant (BSEP) Unit Nos. 1 and 2. The revision changes the operability test requirements for the Residual Heat Removal (RHR) service water pumps. The change establishes additional criteria for a mare com-plete characterization of the required pump performance and corrects an error in the required pump discharge pressure.

An error in the data sheet used in the calibration of the flow instrument in the original startup test resulted in the incorrect dis-charte pressure which now appears in the technical specification. The importance of the discharge pressure for this system is an equipment specification which requires that the pumps maintain a minimum differen-tial pressure of 20 psid from the tube to the shell side of the RHR heat exchangers, thereby preventing reactor water leakage into the service water system. Analyses performed by the plant A-E have shown that even under the worst case situation of two fully degraded pumps receiving the minimum allowable suction pressure of 20 psig, as per ASME Section XI, the 20 psid differential criteria is met for all modes of RHR operation except normal shutdown at reactor vessel pressures greater than 89 psig.

Plant procedures permit shutdown cooling initiation at a reactor vessel pressure of 125 psig, but the plant operating procedures have been revised to require throttling the pumps to a maximum flow of 3250 gpm per pump above 89 psig reactor vessel pressure. This throttled flow provides more than adequate flow for shutdown cooling and ensures an adequate RHR heat exchanger differential pressure.

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411 FayettevWe Street

  • P. O Box 1551 e Raleigh. N C 2 / 602 r-- _am - -m 8 001 ogg .,

Mr. T. A. Ippolito December 31, 1979 This change does not adversely affect any analysis or licensing basis and we have therefore determined that this request comprises one Class II and one Class I amendment. A check for $1600 is attached.

The requested changes are shown on the attached pages with the revisions indicated by a vertical bar in the right hand margin. This change does involve the acceptance criteria for a surveillance test. and the required performance date is near. Therefore, we request your review and approval of this change on an expedited basis. If there is any additional information you require, please contact my staff at once. Your cooperation is appreciated.

Yours very truly,

[E y Executive Vice President Power Supply & Customer Services EAB/CSB/jc Attachments Sworn to and subscribed before me this 31st day of December. 1979.

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