ML20082E811
| ML20082E811 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 11/18/1983 |
| From: | Parsons R CAROLINA POWER & LIGHT CO. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| CON-NRC-144, REF-PT21-83 10CFR-050.55E, 10CFR-50.55E, 80, NUDOCS 8311280327 | |
| Download: ML20082E811 (4) | |
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CD&L Carolina Power & Light Company
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4 lS P. O. Box 101, New Hill, N. C. 27562 November 18,1983 Mr. James P. O'Reilly NRC-144 United States Nuclear Regulatory Commission Region II 101 Marietta Street, Northwest (Suite 2900)
Atlanta, Gecrgia 30303 CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT 1986 900,000 KW - UNITS 1 & 2 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 fourth interim report on the subject item 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 April 18,1984.
Thank you for your consideration in this matter.
Yours very truly, 77f J '&
R. M. Parsons Project General Manager Shearon Harris Nuclear Power Plant RMP/sh Attachment ec:
Mr. G. Maxwell /R. Prevatte (NRC-SilNPP)
Mr. R. C. DeYoung (NRC) 8311280327 831118 PDR ADOCK 05000400 oppF1 AL COPY 1 S
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CAROLINA POWER & LIGHT COMPANY SHEARON HARRIS NUCLEAR POWER PLANT UNIT NO. 1 INTERIM REPORT NO.4
' PRESSURE SENSING LINE IN THE STARTING AIR SYSTEM FOR THE
- EMERGENCY STANDBY DIESEL ENGINE GENERATOR SETS ITEM 80 (DDR 870)
NOVEMBER 11, 1983 REPORTABLE UNDER 10CFR50.55(e)
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SUBJECT:
Shearon Harris Nuclear Power Plant Unit No. 1 10CFR50.55(e) reportable deficiency concerning a potential problem with the pressure sensing lines in the starting air-systems for the Emergency Standby Diesel Engine 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. DiRV-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 March 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 automatically start when the starting air pressi re is less than 150 psig.
DATE PROBLEM OCCURRED:
Refer to secion above.
DATE PROBLEM REPORTED:
April 19, 1982 - CP&L (N. J. Chiangi) notified the (Region II - C. Julian) that this item was reportable under 10CFR50.55(e). Transamerica DeLaval reported this to the NRC under 10CFR Part 21 on March 19, 1982.
SCOPE OF PROBLEM:
The potential problem affects the four pressure sensing lines (two per diesel engine).
SAFETY IMPLICATION:
The Emergency Standby Diesel Engine-Generator Sets supply power to the emergency safety feature buses in the event of a loss of normal on-site and off-site power sources. Failure of the prersure sensing line could affect engine availability.
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REASON DEFICIENCY IS REPORTABLE:
If left uncorrected, the diesel engines might not start during a pressure sensing line f ailure and emergency on-site A.C. power would not be available.
CORRECTIVE' ACTION:
Transamerica DeLaval recommends the installation of a 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 fabricated according to TDI intructions and installed during the installation of the diesel-generator.
E'INAL REPORT: The f abrication of the orifice has been contracted out and is scheduled to be completed by December 30, 1983.
It is currently projected that the installation will be completed by March 30, 1984.- The projected submittal date of a final report is April 18, 1984.
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