ML20012G554
| ML20012G554 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 02/26/1993 |
| From: | Sieber J DUQUESNE LIGHT CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9303090144 | |
| Download: ML20012G554 (2) | |
Text
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Beaver Valley Fower Station j
i Shippingport. PA 15077-0004
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t 6
JOHN D. SIEBER (412) 393-5255 Senior Vice President and Fax {412) 643-8069 YuNa"rN.$r oN,'on February 26, 1993 U.
S.
Nuclear Regulatory Commission Attn:
Document Contz a 7esk washington, DC 20555
Subject:
Beaver Valley Power Station, Unit No. 1 Docket No. 50-334, License No. DPR-66 Recirculation Spray Heat Exchanger Leak Testing f
As a
result of meetings on March 25 and April 22, 1980, Duquesne Light Company (DLC) agreed to perform _ leak testing'of the BVPS-1 Recirculation Splay Heat Exchangers.
DLC chose freon leak testing 10ge magnitude of the establishad acceptable' leak rate limits due to t
GPM) and the ability
<>f the svailable freon detection-i (2
x equip: ant to identify a leak this small.
Tte NRC staff subsequently summarized the meeting discussions in a letter to DLC dated May.2,-
1980.
In order to avoid the use of freon due to its environmental impact and impending usage restrictions, DLC has initiated the consideration of alternative leak test methodologies.
In addition, the freon test method provides "go - no go" results and has proven to be ineffective in locating or quantifying identified leakage.
has cagefully researched the calculations associated with the.
DLC original 2x10-gpm leak rate criterion and the radiation monitor alarm setpoint.
New calculations using the current licensing basis value for river dilution (545 vs. 10 originally) show that projected drinking water doses can be reduced below those reported in the May 2, 1980 letter while accommodating a leak rate of.01 gpm.
A revised leak rate acceptance criterion of.01 gpm permits the use of an alternative air make-up test method since it is within the measurement capability of air make-up test equipment.
This method i
has the additional capability of quantifying actual leak. rates and it' enhances troubleshooting efforts in locating leaks.
This is the same method used for Type C containment leak testing.
Future testing will use
- this, or a
comparable test
- method, along with the revised i
. acceptance criterion.
050047 c-ELECTRK UTIUTYof 1HE YEAR r
4;1 l 0
0 9303090144 930226 PDR ADOCK 05000334 E
PDR I
t jRddirc. Spray Ht. Exch. Leak Testing-Page.2 The-change in the acceptance criteria has been evaluated in accordance with 10 CFR 50.59
- and, therefore, no response to this letter is requested.
Any questions related to this change may be directed to Gary Beatty at (412) 393-5225.
Sincerely, t
i j
J.
D.
Sieber cc:
Mr.
L. W.
Rossbach, Sr. Resident Inspector l
Mr. T.
T.
Martin, NRC Region I Administrator Mr.
G.
E.
Edison, Project Manager Mr. M.
L.
Bowling (VEPCO)
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