ML20064M731
| ML20064M731 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 02/09/1983 |
| From: | Woolever E DUQUESNE LIGHT CO. |
| To: | Jordan E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| References | |
| REF-SSINS-6820 2NRC-3-008, 2NRC-3-8, IEB-81-03, IEB-81-3, NUDOCS 8302150626 | |
| Download: ML20064M731 (3) | |
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2NRC-3-008 (412) 787 - 5141 Telecopy 1 Nuclear Construction Division February 9, 1983 Robinson Plaza, Buhding 2, Suite 210 Pittsburgh, PA 15205 United States Nuclear Regulatory Commission Washington, DC 20555 ATTENTION: Edward L. Jordan, Director Division of Engineering and Quality Assurance Office of Inspection and Enforcennt SUBJECT :
Beaver Valley Power Station - Unit No. 2 Docket No. 50-412 IE Bulletin No. 81-03:
Flow Blockage of Cooling Water to Safety System Components by Corbicula SP.
Response to Request for Additional Information Gentlemen:
The intake structure is a shared facility between Beaver Valley Units 1 and 2.
Upon going operational, Beaver Valley Unit No. 2 (BVPS-2) will adopt the methods used by Beaver Valley Unit No. 1 (BVPS-1), Docket for detecting any potent.a1 flow blockage or degradation due to i
No. 50-334, clams or shell debris.
The BVPS-2 Final Safety Analysis Report (FSAR) Sec tion 9.2.1.1.4 describes the inspection and testing requirements for the Service Water System (SWS).
The SWS will be tested and inspected in accordance with ASME Section XI.
Visual inspections will be conducted periodically on components of systems potentially af fected by clam fouling.
For components such as recirculation spray heat exchangers, where a visual inspection is not practicable, Operational Surveillance Test results will be used to give conclusive evidence that flow blockage had not occurred. A silt check will be performed periodically to check and eliminate debris from the bays of the intake structure.
Visual inspections for clams will be included in procedures to aid in detecting any increase in clam infestation of cooling systems.
Provisions for pressure drop and flow measurements have been included in the BVPS-2 system design to meet the requirements of a Category I System, and would be able to detect significant changes in flow or heat exchanger degradation.
The potential for intrusion under worst-case conditions existr for BVPS-2 when construction is completed.
However, operational surveillance testing on safety related components cooled by the SWS, ASME Section XI testing on SWS components, and visual inspection, will provide adequate indic. ions of potential problems involving flow blockage or degradation due to clam debris for BVPS-2.
To date, no significant clam fouling has occurred in the potentially affected fire protection and safety related systems and components at BVPS-1.
6 8302150626 930209 V
PDR ADOCK 05000412 Q
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United States Nucles.- Ragulctory Commiosion Edward L. Jordan, Director page 2 A description of the existing monitoring program for the detection of Corbicula SP. in the plant vicinity will be addressed in the BVPS-1 response to a similar NRC request for additional information concerning the subject bulletin.
Since BVPS-1 and BVPS-2 share the same intake structure, it is felt that the results provided by BVPS-1 concerning this issue are valid for BVPS-2.
It is expected that BVPS-1 will provide this additional information to the NRC by February 14, 1983.
If there are any questions concerning this response, please contact E. F. Kurtz, Jr., Manager, Regulatory Af fairs at (412) 787-5141, extension 103.
DUQUESNE LIGHT COMPANY By E. J M Woolever Vice President i
JMM/wjs cc:
Mr. R. DeYoung, Director, Of fice of Inspection and Enforcement (3)
NRC Document Control Desk Mr. G. Walton, NRC Resident Inspector Ms. L. Lazo, NRC Project Manager l
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l SUBSCRIBEDANDfW0lpiTOBEFOREMETHIS 9// DAY OF 7 e /Cu, au
, 1983.
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Notary Public ANITA ELAINE REITER, NOTARY PUBUC l
ROBINSON 107.'NSHIP. ALLEGHENY COUNTY l
MY COMMISSION EXPIRES OCTOBER 20,1986 i
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United Stetas Noclect Regulatory Commission Edward L. Jordan, Director page 3 COMMONWEALTH OF PENNSYLVANIA )
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COUNTY OF ALLEGHENY
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On this
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day of Mr
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, before me, a Notary Public in and for said Commk
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and County, personally 1
appaared E. J.
Woolever, who being d ily sworn, deposed and said that (1) he is Vice President of Duquesne Light, (2) he is duly authorized to exe-cute and file the foregoing Submittal on behalf of said Company, and (3) the statements set forth in the Submittal are-true and correct to the best-of his knowledge.
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Notary Public i
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ANITA ELAINE fiEITER, NOTARY PUEllC ROBINS 0T1 TOWNSHIP, ALLEGHENY COUNTY MY COMMISSION EXPIRES OCTOBER 20,1986 i
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