ML20205C529
| ML20205C529 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 08/01/1986 |
| From: | Carey J DUQUESNE LIGHT CO. |
| To: | Tam P Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8608120351 | |
| Download: ML20205C529 (2) | |
Text
/
4-
'Af Telephone (412) 393-6000 Nu learG,roup August 1, 1986 Bo Shippingport, PA 15077-0004 Director of Nuclear Reactor Regulation d
U. S. Nuclear Regulatory Commission Attn:
Mr. Peter S. Tam, Project Manager Project Directorate No. 2 Division of PWR Licensing - A Washington, DC 20555
- Mail Stop 340 -
Reference:
Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 Inservice Inspections - IIT Gentlemen:
This letter is intended to provide follow-up documentation of a telephone conference on July 29, 1986, between Mr. Ken Grada (DLC),
Mr.
Herbert Askwith (HAFA),
Mr.
George Johnson (NRC) and yourself regarding the hold time requirement for insulated systems when conducting inservice inspections.
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.
As a
result of the above referenced telephone conference, it was concluded that a
10 minute time would be acceptable for the IIT pressure test on the Safety Injection (SI)
Acculumator Tanks discharge piping.
It was determined that the usual 2 hour2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> hold time requirement for insulated systems as described in the Topical Report could be waved based on the following:
1.
Only selected short portions of the piping are insulated; ie:
only sections near walkways are insulated for personnel protection.
2.
No single section of insulation covers more than one weld.
emsne a
i
gnver Valley Powar Station, Unit No. 1 Docket No. 50-334, Licensa No. DPR-66 Inservice Inspection - IIT Page 2 3.
The insulation on this piping is of the canned stainless steel type.
4.
No leakage has occurred on these lines in the past as evidenced by the stable levels and pressures in the SI Accumulator Tanks which are normally pressurized to between 605-661 psig.
If you have any questions regarding this submittal, please contact me or members of my staff.
Very truly yours,
. Car e Pres dent, Nuclear I
i i
cc: Mr. W. M. Troskoski, Resident Inspector U.
S. Nuclear Regulatory Commission Beaver Valley Power Station Shippingport, PA 15077 U. S. Nuclear Regulatory Commission c/o Document Management Branch Washington, DC 20555 Director, Safety Evaluation & Control Virginia Electric & Power Company P.O. Box 26666 One James River Plaza Richmond, VA 23261 J