ML20084G536
| ML20084G536 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 04/18/1984 |
| From: | Parsons R CAROLINA POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| CON-NRC-212, REF-PT21-84 80, NUDOCS 8405070260 | |
| Download: ML20084G536 (4) | |
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_ - s w -- ms P. O. Box 101, New Hill, N. C. 27562 April 18,1983 Mr. James P. O'Reilly N RC-212 United States Nuclear Regulatory Commission Region II 101 Marietta Street, Northwest (Suite 2900)
Atlanta, Georgia 30303 CAROLINA POWER & LIGHT COMPANY SHEARON HARRE NUCLEAR POWER PLANT 1986 - 900,000 KW - UNIT 1 PRESSURE SENSING LINE IN THE STARTING AIR SYSTEM FOR EMERGENCY STANDBY DIESEL-GENERATOR SETS, PURCHASE ORDER NY-435079, ITEM 80
Dear Mr. O'Reilly:
Attached is our fifth interim report on the subject itcin which was deemed reportable per the provisions of 10CFR50.55(e), on April 19,1982. CP&L is pursuing this matter, and it is currently projected that corrective action and submission of the final report will be accomplished by June 18,1984.
Thank you for your consideration in this matter.
Yours very truly, M
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R. M. Parsons Project General Manager Shearon Harris Nuclear Power Plant RMP/sh Attachment ec:
Messrs. G. Maxwell /R. Prevatte (NRC-SHNPP)
Mr. R. C. DeYoung (NRC) 8405070260 84041g DR ADOCK 05000400 PDR
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3 CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT UNIT NO. 1 INTERIM REPORT NO.5 PRESSURE SENSING LINE IN THE STARTING AIR SYSTEM FOR THE EMERGENCY STANDBY DIESEL ENGINE GENERATOR SETS ITEM 80 (DDR 870)
APRIL 18, 1984 REPORTABLE UNDER 10CFR50.55(e).
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SUBJECT:
Shtaron Harris Nuclear Powzr Plant Unit No. 1 j
10CFR50.55(e) reportable deficiency concerning a potential problem with the pressure sensing lines in.
the starting air systems for the Emergency Standby Diesel Engir.e Generator Sets supplied by Transamerica DeLaval, Inc., under Purchase Order NY-435079.
ITEM:
The pressure sensing line between the starting air storage tank manual isolation valve and pressure switch mounted on the starting air compressor for the Transamerica DeLaval, Inc. Standby Diesel Engine Generators: Model No. DS RV-16-4.
SUPPLIED BY:
The manual isolation valves, compressors, and air tanks are supplied by Transamerica DeLaval, Inc.,
Oakland, California. The sensing line is furnished and installed by CP&L in accordance with the design documents generated by Ebasco Services, Inc.
NATURE OF DEFICIENCY:
In a letter dated Itarch 24, 1982, Transamerica DeLaval notified CP&L that in the event of a pressure sensing line failure during a seismic event, the starting air pressure could. bleed down to 150 psig in a minimum of six minutes. The' engine will not autoxatically start when the starting air pressure is less than 150 psig.
DATE PROBLEM OCCURRED:
Refir to nection above.
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- DATE PR03LEM REFORTED:
April 19, 1982 - CP&L (Ni J. Chiangi) notified the NRC-(Region II - C.'Julian) that this item;wan reportable under.10CFR50.55(e). Transamerica DeLaval reported this to the NRC under ICCFR, Part.21 on March-19, 1982.
SCOPE OF
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PROBLEM:
The potential prcblem affects the four preasure sensing lines-(two per diesel engine)..
S FETY IMPLICATION:
The Emergency Standby. Diesel Engine-Generator Sets supply power to the-cmergency safetyJfeatures buses in the' event of a loss of normal on-site and off-site:
power _ sources. " Failure of the pressuEe sensing line couldEaffect engine; availability.
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REASON DEFICIENCY IS If left uncorrected, the diesel engines might not REPORTABLE:
start during a pressure sensing line failure and emergency on-site A.C. power would not be available.
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CORRECTIVE ACTION:
Transamerica DeLaval recommends the installation of an 1/8" restrictive orifice between the manual isolation valve and the starting air tank, which would increase the time to reach 150 psig to 53 minutes if the sensing line failed. This orifice will be installed during installation of the diesel-generator.
l FINAL REPORT: The fabrication of the orifice has been delayed due to the inability to find a qualified machine shop willing to bid the purchase requisition. The i
requisition for this fabrication has been reissued and is scheduled to be completed by May 18, 1984.
It is currently projected that the installation will be completed by May 30, 1984. The projected submittal-date of a final report is June 18, 1984.
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