ML20207D013
| ML20207D013 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 12/23/1986 |
| From: | Domer J TENNESSEE VALLEY AUTHORITY |
| To: | Youngblood B Office of Nuclear Reactor Regulation |
| References | |
| TVA-SQN-TS-71, NUDOCS 8612300301 | |
| Download: ML20207D013 (4) | |
Text
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.e-a TENNESSEE VALLEY AUTHORITY CHATTANOOGA. TENNESSEE 374ol SN 157B Lookout Place DEC 23 E86 TVA-SQN-TS-71 Director of Nuclear Reactor Regulation Attention:
Mr. B. Youngblood, Project Director PWR Project Directorate No. 4 Division of Pressurized Water Reactors (PWR)
Licensing A U.S. Nuclear Regulatory Commission Washington, D.C.
20555
Dear Mr. Youngblood:
In the Matter of
)
Docket Nos. 50-327 Tennessee Valley Authority
)
50-328 SEQUOYAH NUCLEAR PLANT - TECHNICAL SPECIFICATION CHANGE 71 - AUKILIARY FEEDWATER PUMP PRESSURE DROP REQUIREMENTS Dy our letter dated July 24, 1986 we requested changes to the Sequoyah Nuclear Plant units 1 and 2 technical specifications that would delete specific differential pressure values required by SR 4.7.1.2.a.1 and SR 4.7.1.2.a.2 to prove operability of the motor-driven and steam turbine-driven auxiliary feedwater pumps.
In that letter, we identified that the required specific differential pressure values would be contained within the appropriate plant instructions.
During a telephone conference call held on October 31, 1986 between J. Holonich of NRC and M. Burzynski of TVA, we were advised that NRC could not approve the proposed technical specification change in the form that it was originally submitted. We are, therefore, withdrawing the subject proposed technical specification change.
The present technical specification test requirements for the motor-driven pumps are less restrictive than those necessary to meet system performance requirements.
This situation has occurred because TVA has modified the pump runout protection from pressure control valves to cavitating venturies so as to address reliability problems associated with valves in that system. TVA plans to resubmit a technical specification that will replace the current specific differential pressure values to prove operability of the motor-driven auxiliary feedwater pumps with values obtained from startup testing. This action will ensure that the differential pressure values given for the auxiliary feedwater pumps in the technical specifications are adequately restrictive to meet system performance requirements.
Furthermore, TVA will also use the differential pressure values obtained during testing to ensure motor-driven pump operability during the time required to process the technical specification change.
8612300301 B61223 PDR ADOCK 05000327 gh[
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, Director of Nuclear Reactor Regulation DEC 231996 The enclosure identifies the commitments TVA is making with respect to this proposed technical specification change.
Please direct questions you may have concerning this issue to Timothy S. Andreychek at 615/870-7470.
Very truly yours, TENNESSEE VALLEY AUTHORITY h
}J.A.Domer,AssistantDirector
. A. L w Nuclear Safety and Licensing i
Sworn'to a d subscr before me thi day of 1986 hotary Public My Commission Expires 7
O Enclosure cc (Enclosure):
U.S. Nuclear Regulatory Commission Region II Attn:
Dr. J. Nelson Grace, Regional Administrator 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 Mr. Michael H. Mobley, Director (w/o Enclosure)
Division of Radiological Health T.E.R.R.A. Building 150 9th Avenue North Nashville, Tennessee 37203 Mr. Carl Stahle Sequoyah Project Manager U.S. Nuclear Regulatory Commission 7920 Norfolk Avenuo Bethesda, Maryland 20814 Mr. G. G. Zech, Director TVA Projects U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, NW, Suite 2900 Atlanta, Georgia 30323 I
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ENCLOSURE SEQUOYAH NUCLEAR PLANT TECHNICAL SPECIFICATIONS CHANGE 71 AUXILIARY FEEDWATER PUMP PRESSURE DROP REQUIREMENTS COMMITMENTS LIST e
G Sequoyah Nuclear Plant Technical Spcifications Change 71 Auxiliary Feedwater Pump Pressure Drop Requirements Commitments List Item Commitment Date 1.
Itse test values for motor-driven As soon as available auxiliary feedwater pumps in pro-cedures until technical specifi-cation change is approved.
2.
Submit technical specification 61 Days after completion change with values obtained from of testing teuting as the pressure drop values to be required by the technical specifications to assure operability l
of the motor-operated auxiliary feed-water pumps.
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