ML20029E003
| ML20029E003 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 05/05/1994 |
| From: | Sieber J DUQUESNE LIGHT CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9405160031 | |
| Download: ML20029E003 (2) | |
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Be ver Val:ey Power Station Shippmgport. PA 15077 0004 JOHN O SIEBER (412) 393 5255 f an (412) 643-8069 Senior Vice Preudent and Ch,ef Nuclear Off.cer May 5, 1994 l
Nuclear Power Dms on U.
S.
Nuclear Regulatory Commission Attn:
Document Control Desk Washington, DC 20555
Subject:
Beaver Valley Power Station, Unit No. 1 and No. 2 BV-1 Docket No. 50-334, License No. DPR-66 BV-2 Docket No. 50-412, License No. NPP-73 Code Case N-416-1; Alternative Pressure Test Requirement for Wolded Repairs or Installation of Replacement Items by Welding The purpose of this submittal is to request approval, pursuant to 10 CFR
- 50. 55a (a) (3 ),
for the use of a system leakage test as an alternative pressure test in lieu of performing the hydrostatic i
pressure test required by ASME Section XI, IWA-4000 after welded repairs or installation of replacement items by welding.
Code Case N-416-1 of the ASME Boiler and Pressure Vessel Code (approved February 11, 1994) addresses the use of a system leakage test as an alternative pressure test in lieu of performing the hydrostatic pressure test required by IWA-4000 provided the'following are met:
1.
NDE shall be performed in accordance with the methods and acceptance criteria of the applicable Subsection of the 1992 Edition of ASME Section III.
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2.
Prior to or immediately upon return to service, a VT-2 visual examination shall be performed in conjunction with a system leakage test, using the 1992 Edition of ASME Section XI, in accordance with IWA-5000, at nominal operating pressure and temperature.
3.
Use of the Case shall be documented on an NIS-2 Form.
The Beaver Valley plant design includes certain piping vent,
- drain, and test connections which have been determined to result in.
recurring maintenance activities.
Specific design arrangements are being reevaluated which could reduce radiation exposure, maintenance activities, plant
- downtime, and forced outages.
By utilizing this Code
- Case, the need for hydrostatic tests would decrease, thereby reducing the need for some of those connections.
.DEllVERING
.0 0 A l l t Y 9405160031 94050s INER'6Y POR ADOCK 05000334 P
PDR 1 0
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BhaverValleyPowerStation, Unit No. 1 and No. 2 Code Case N-416-1; Alternative Pressure Test Requirement for Welded Repairs or Installation of Replacement Items by Welding Page 2 This alternative pressure test has been evaluated by the ASME Code Case Committee and determined to be an acceptable test following i
repair procedures.
It is proposed that an acceptable level of quality and safety will be maintained by following the requirements put forth in Code Case N-416-1.
Beaver Valley Unit No.
1 is currently scheduled to begin its refueling outage on October 7, 1994.
Approval to use this Code Caso during the refueling outage would result in an immediate benefit associated with scheduled maintenance activities by permitting system leakage testing in place of hydrostatic testing.
In addition, there are a
number of valves which would no longer be needed to support hydrostatic testing and these valves could be removed and the lines capped during the outage.
We request NRC review and approval on a i
schedule which would support the maintenance activities performed during the outage.
If you have any questions, please contact Mr. Steve Sovick at (412) 393-5211.
Sincerely,
- LkUL,
~
/
D.
Sieber cc:
Mr.
L.
W.
Rossbach, Sr. Resident Inspector Mr.
T.
T.
Martin, NRC Region I Administrator Mr.
G.
E.
Edison, Project Manager i
.~.
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