ML18139A111
| ML18139A111 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 03/18/1980 |
| From: | Ferguson J VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| References | |
| IEB-79-14, NUDOCS 8004020027 | |
| Download: ML18139A111 (2) | |
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,r JACX B. FBROUSON BXBCllmB V:um PlmBn>BNT Mr. James P. O'Reilly, Director Office of Inspection & Enforcement U.S. Nuclear Regulatory Commission Region II 101 Marietta Street, Suite 3100 Atlanta, GA 30803
Dear Mr. O'Reilly:
March 18, 1980 REQUEST FOR ANALYSIS EXTENSION FOR I.E. BULLETIN 79-14
'. *, : SURRY POWER STATION - UNIT 1 Serial No. 195 PSE&C/CMRjr:mac:wang Docket No. 50-280 License No. DPR-32 We wish to inform you that substantial progress has been made to comply with the provisions of I.E.Bulletin 79-14 as set forth in the time table in our letter of October 4, 1979 (Vepco Serial No. 817).
An expedited schedule has been used to the maximum possible extent commensurate with thorough and accurate procedures to e$tablish the validity of all calculations.
We must inform you that total completion of I.E.Bulletin 79-14 analyses is not possible in the five month period stated in our October 4, 1979 letter. Based upon our progres, to date, we believe an extension to the end of May is necessary to substantially complete the analysis.
We believe it is imperative to continue, in a timely manner, our established program of quality calculations to assure the highest confidence level in the Surry piping systems.
Under these circumstances; we feel that an extension to May is justified and consistent with your concern for an expedited, yet thorough, review of I.E.Bulletin 79-14 piping systems.
By the end of May, analyses will be completed to the extent that all modifications will.be identified sufficiently to allow field work to proceed. Final _checking, verification, documentation, Engineering Assurance signoff, and r~Jated activities will continue after the end of May.
In addition, there are two long term items which will require analysis beyond the end of May to fully complete the final I.E.Bulletin 79-14 analysis. Both items involve the service water system outside the containment and were not foreseen at the time of the original commitment to a five month analysis period.
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VIRGINIA ELECTRIC AND POWER COMPANY TO Mr. James P. 0 1Reilly, Director The first item concerns the service water system consisting of Class 136
{reinforced fiberglass) piping supplying the three control room.air conditioning chillers. To enhance maintainability, we are curre.ntly designing a more efficient routing of the system. A complete piping system changeover.
will not be operational until after mid-summer. The final I.E.-Bulletin 79-14 analysis, therefore, cannot take place until this piping work,h~s been completed.
The second item concerns other portions of the service water p1p1ng consisting of Class 136 piping. It is our intent to upgrade this piping as much as,practicable to the best available technology through the use of Regulatory Guide 1.72, "Spray Pond Piping Made From Fiberglass-Reinforced Thermosetting Resin," and ASME Section III, Code Case N-155-2, "Fiberglass.
Reinforced Thermal Setting Resin Pipe 11 as guidelines. These documents were not in existence when the original analysis was performed, and their use..
represents a definite upgrade of the system to further enhance the analytical acceptability of the Class 136 piping at Surry. The final I.E.Bulletin 79-14 analysis, therefore, cannot take place until this work has been completed.
As you are aware, *:w~.'fr~ve been in regular conmunication with your staff since October in order to:keep you fully apprised of our efforts.
We intend to continue this practite.*.
We believe our request for an extension of time to the end of May for the completion of analysis in the extent noted above is reasonable and justifiable.
We would appreciate a prompt review of our request.
cc: Mr. Victor Stello, Director Very truly yours,
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J. H. Ferguson Executive Vice President - Power Office of Inspection & Enforcement Mr. Harold R. Denton, 'Director Office of Nuclear Reactor Regulation 2
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