ML19341D736
| ML19341D736 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 04/02/1981 |
| From: | Mills L TENNESSEE VALLEY AUTHORITY |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, SQRD-50-328-81, NUDOCS 8104080556 | |
| Download: ML19341D736 (2) | |
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400 Chestnut Street Tower II April 2, 1981
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Mr. James O'Reilly, Director
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Office of Inspection and Eliforcement 8
U.S. Nuclear Regulatory Connission
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Region II - SuiteNJ100 101 Marietta Stree
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Dear Mr. O'Reilly:
SEQUOYAH NOCLEAR PLANT UNIT 2 - RETRIEVABLE INFORMATION FROM VALVE TAG NUMBERS - SQRD-50-328/81 THIRD INTERIM REPORT The subject deficiency was initially reported to NRC-0IE Inspector M. Thomas cm December 12, 1980, in accordance with 10 CFR 50.55(e) as NCR SQN CED 8035. Interim reports were submitted on January 12 and March 2, 1981. Enclosed is our thini interim report. We expect to submit our next raport by June 10, 1981.
I If you have any questions, please get in touch with D. L. Lambert at FTS 857-2581.
Very truly yours, TENNESSEE VALLEY AUTHORITY l
L. M. Mills, Manager Nuclear Regulation and Safety Enclosure oc:
Mr. Victor Stallo, Director (Enclosure))
Office of Inspection and Enforcement U.S. Nuclear Regulatory Commission Washington, DC 20555 Ol S
llI 8104080556
ENCLOSURE SEQUOYAH NUCLEAR PLANT UNIT 2 RETRIEVABLE "iFORMATION FROM VALVE TAG NUMBERS SQRD-50-328/81-05 10 CFR 50.55(e)
THIRD INTERIM REPORT Description of Deficiency Manufacturer's valve drawings which include pertinent engineering data used in piping analysis and other design calculations cannot be readily retrieved through any TVA cocumentation system as required by 10CFR50, Appendix B.
Proper identific.ation of valves should be maintained by part number, serial number, or other appropriate means en the valve bodies and cross-referenced on all associated drawings and permanent records. This identification is used for the retrieval of records and is designed to prevent the use of incerrect parts and components in piping systems.
Corrective Action TVA is comparing data (weight, length, and center of gravity) on manufacturer's valve drawings to those used in piping analyses.
Manufacturer's general catalogs are being used to obtain valve data for drawings which cannot be obtained because they do not exist (primarily for valves 2 inches or smaller) or cannot be located.
Analyses in which discrepancies are found are being reevaluated to determine if support changes will be required. This action is part of the Bulletin 79-14 effort and is discussed in more detail in the final report pertaining to this bulletin for SQNSWP8023 The complete field walkdown, reanalysis, and rework of piping and supports will be completed before fuel loading. Any rework not complete by fuel loading will be justified on a case-by-casa basis. This will ensure the seismic integrity of safety-ralated piping systece. TVA is still evaluating what action is required to develop a better documentation system.