ML20214H841
| ML20214H841 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 05/14/1987 |
| From: | Sieber J DUQUESNE LIGHT CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| NUDOCS 8705270519 | |
| Download: ML20214H841 (2) | |
Text
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'Af Telephone (412) 393 6000 V 'e':??*
Sheppmgport, PA 15077-0004 May 14, 1987 U. S. Nuclear Regulatory Commission Attn:
Document Control Desk Washington, DC 20555
Reference:
Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 Pressure Testing Hold Time Gentlemen:
This letter is intended to provide follow-up documentation of a telephone conversation on April 1, 1987, between Mr. George Johnson of the NRC staff, Mr. Herbert Askwith of HAFA International and Mr.
Dave Grabski of Duquesne Light Company regarding the hold time requirement for pressure testing insulated systems that are located inside containment and will be tested in Mode 3,
under vacuum conditions.
The affected systems include portions of the Charging and Volume Control System (i.e., the two lines bounded by check valve CH-32 and MOV-CH-310 and check valve CH-222 and MOV-CH-311) and the portions of Main
- Steam, Feedwater, and Steam Generator Blowdown Systems located inside containment.
On May 15,
- 1986, the NRC approved our use of the Instrumented Inspection Technique (IIT) as an alternative testing method for meeting the requirements of Section XI of the ASME Code for inservice pressure tests.
This technique is described in Topical Report HAFA 135 P-A which received NRC acceptance on November 7, 1985.
During the performance of this testing on the above noted
- systems, the test party is required to be inside containment to align system valves to the test position, monitor test equipment, visually inspect the lines following the hold time, and realign system valves in case the test had to be aborted for any reason.
A decrease in the two (2) hour hold time was proposed to minimize the duration of the test party's stay inside containment where communication is limited to non-verbal due to required breathing apparatus and
- noise, temperatures exceeding 100*F, and activity and mobility being severely limited due to the subatmospheric conditions.
8705270519 B70514 p0qi DR ADOCK 05000334 PDR t o
o-e BScvsr Vcllcy Powar Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 Pressure Testing Hold Time Page 2 As a
result of the above referenced telephone conference it was concluded that a ten (10) minute hold time would be acceptable to the NRC for the IIT testing on the noted lines.
It was determined that the two hour hold time requirement for insulated systems as described in the Topical Report could be waved based on the following:
1.
The test boundary will be fully instrumented as described in the Topical Report.
This will provide positive assurance of the integrity of the test boundary.
2.
The test boundary will be monitored while the plant is ascending in pressure and temperature from Mode 5 to Mode 3.
- Thus, the total time the lines are monitored will be greater than two (2) hours.
3.
The lesser hold time will minimize the amount of time the test party is exposed to harsh environmental conditions.
If there are any questions concerning this matter, please contact my office.
Very truly yours, b
la.
J. D. Sieber Vice President, Nuclear cc: Mr. S. M. Pindale, Resident Inspector U.
S. Nuclear Regulatory Commission Beaver Valley Power Station Shippingport, PA 15077 U.
S. Nuclear Regulatory Commission Regional Administrator Region 1 631 Park Avenue King of Prussia, PA 19406 Mr. Peter S. Tam U. S. Nuclear Regulatory Commission Project Directorate No. 2 Division of PWR Licensing - A Washington, DC 20555
- Mail Stop 316 Addressee only Director, Safety Evaluation & Control Virginia Electric & Power Company P.O. Box 26666 One James River Plaza i
Richmond, VA 23261
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