ML18022A476

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Submits Addl Info Re Turbine Overspeed Protection,Per NRC Reviewer Request.Test of Turbine Mechanical Overspeed Protection Sys Conducted in no-load Condition During Power Ascension Testing
ML18022A476
Person / Time
Site: Harris Duke Energy icon.png
Issue date: 12/05/1986
From: Zimmerman S
CAROLINA POWER & LIGHT CO.
To: Harold Denton
Office of Nuclear Reactor Regulation
References
NLS-86-452, NUDOCS 8612150089
Download: ML18022A476 (4)


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REQUL RY INFORMATION DISTRIBUT BYSTEN (RIDB)

ACCESSION NBR: 8612150089 DOC. DATE: 86/12/05 NOTARIZED: NO DOCKET I FACIL: 50-400 Shearon Harris Nuclear Power Planti Unit ii Carolina 05000400 AUTH. NAI fE AUTHOR AFFILIATION ZINNERNANi S. R. Carolina Power h Light Co.

RECIP. NANE 'ECIPIENT AFFILIATION DENTONi H. R Of f ice of Nuclear Reactor Regulationi Direc tor (post 851 125

SUBJECT:

Submits addi info re turbine overspeed protection for plant>

per verbal request from NRC reviemer.

DISTRIBUTION CODE: BOOID TITLE: Licensing CDPIES RECEIVED: LTR Submittal: PBAR/FSAR Amdts a8 gRelated ENCL 0 SIZE:

Correspondence NOTES: Application for permit renewal filed. 050OOZO0 RECIPIENT COPIEB RECIPIENT COPIES ID CODE/NAf'fE LTTR ENCL ID CODE/NAf'fE LTTR ENCL PWR-A EB PWR-A EICSB PWR-* FOB PWR-A PD2 LA PWR-A PD2 PD BUCKLEY'S B 01 PWR-A PSB PWR-* RBB INTERNAL: ACRB 41 ADM/LFNB ELD/HDB1 IE FILE IE/DEPER/EPB 36 IE/DGAVT/GAB 21 NRR BWR ADTB NRR PWR-B ADTS NRR ROE> l'f. L NRR/DHFT/NTB

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0 CKK Carolina Power & Light Company DEC 5 1986 SERIAL: NLS-86-052 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Washington, DC 20555 SHEARON HARRIS NUCLEAR POWER PLANT DOCKET NO. 50-000/LICENSE NO. NPF-53 TURBINE OVERSPEED PROTECTION

Dear Mr. Denton:

Carolina Power k Light Company (CPRL) hereby submits additional information concerning turbine overspeed protection at the Shearon Harris Nuclear Power Plant (SHNPP). This information is submitted in response to a verbal request for additional information from the NRC reviewer. The following additional information on turbine overspeed testing is provided to satisfy this request:

The test of the Turbine Mechanical Overspeed Protection System is conducted in the no load condition during power ascension testing (9103-S-27).

The electrical overspeed protection system was tested as part of preoperational test (1-5015-P-Ol).

Per Technical Specification 0.3.0.2.b, the electrical and mechanical overspeed protection systems are physically tested every 18 months per the following surveillance tests:

Mechanical Overspeed - Operations Surveillance Test OST-1075 Electrical Overspeed - Maintenance Surveillance Test MST-1-319 The Westinghouse analysis of a SHNPP turbine overspeed event assumed a generic rotor design. The generic rotor assumption envelopes the new SHNPP Low Pressure Rotor design.

The Westinghouse analysis of a SHNPP turbine overspeed event used a computer model which has been shown to be conservative based on actual overspeed events at the Salem Nuclear Plant. The Westinghouse analysis for Salem predicted an overspeed of 105.596 which was corroborated by three actual overspeed events from full power which resulted in overspeeds averaging 100.896.

8b12150089 8 400 pDR ADQGH. 0500@DR P

411 Fayetteville Street o P. O. Box 1551 ~ Raleigh. N. C. 27602

h w4 Mr. Harold R. Den OEC 5 )9gg NLS-86-052/Page 2

'e If you have any questions on this subject or require additional information, please contact me.

Yours ve ruly,

/.Zimmerman Manager Nuclear Licensing Section 3HE/kts (5086SDC) cc: Mr. B. C. Buckley (NRC)

Dr. 3. Nelson Grace (NRC-RII)

Mr. R. J. Giardina (NRC-PAPS)

Mr. G. F. Maxwell (NRC-SHNPP)