ML20072L701
| ML20072L701 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 06/27/1983 |
| From: | Warembourg D PUBLIC SERVICE CO. OF COLORADO |
| To: | NRC |
| References | |
| REF-SSINS-6820 IEB-83-03, IEB-83-3, P-83227, NUDOCS 8307140157 | |
| Download: ML20072L701 (1) | |
Text
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public Service Company Cf Od usde i
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16805 WCR 19 1/2, Platteville, Colorado 80651 4
i June 27, 1983 Fcrt St. Vrain Unit #1 P-83227 i
U. S. Nuclear Regulatory Commission i
Documents Control Desk Washington, D.C.
20555 Gentlemen:
Attached for reproduction and distribution, please find one copy of the Public Service Company of Colorado response to IE Bulletin 83-03 previously submitted to Mr. John T. Collins of the USNRC in Region IV.
Very truly yours, 0.,, ten vem in,q nj 7%AJ j
Don Warembourg i
Manager, Nuclear Production DWW/dkh Attachment
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a 8307140157 830627 PDR ADOCK 05000267 G
h PUBLIC SERVICE COMPANY OF COLORADO P.
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BOX 840 DENVER. COLORADC 80208 f
3O'p OSCAR R. LEE June 8, 1983 v'cc c=ce Fort St. Vrain Unit No. 1 P-83201 P R@ E JM B '
Mr. John T. Collins, Regional Administrator Region IV k
'JN I 31983 Nuclear Regulatory Commission
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611 Ryan Plaza Drive Suite 1000 Arlington, Texas 76011 Docket No. 50-267
Subject:
Dear Mr. Collins:
The following is a summary of the actions taken by Public Service Company of Colorado (PSC) in response to IE Bulletin No. 83-03 regarding' check valve failures in raw water cooling systems of diesel generators.
(1) In response to " Required Action No.
1", Public Service Company has included in the annual preventative maintenance program at Fort St. Vrain an inspection of the check valves in both the service water and emergency fire water supplies to the cooling systems of both emergency diesel generators.
Please note that there are no check valves in the discharge of these systems meeting the criteria stated in the bulletin.
(2)
In reponse to " Required Action No.
2",
an integrity verification procedure was prepared for disassembling the check valves and inspecting the valve internals.
This procedure has been incorporatd into the annual preventive maintenance program referred to in (1) above.
(3) Public Service Company has already performed the initial valve integrity verification procedures in response to
" Required Action No. 3".
See (5) below for the results of this test.
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Mr. John Collins P-83201 (4)
In response to Required Action No.
4",
Public Service Company submits the following:
(a) The valves included in the annual preventative maintenance program referred to in (1) above are listed below.
Valve No.
Description V-42815 Service Water Supply To Engine 1A V-45813 Fire Water Supply To Engine 1A V-42816 Service Water Supply To Engine 18
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V-45814 Fire Water Supply To Engine IB V-42813 Service Water Supply To Engine IC V-45811 Fire Water Supply To Engine IC V-42814 Service Water Supply To Engine ID V-45812 Fire Water Supply To Engine ID (b) The valve integrity verification procedure referred to in (2) above involves the disassembly of each valve listed in (4)(a) above and the inspection of each for wear, damage, freedom of movement, corrosion and scaling, correct installation, and component retention.
Any deficiencies observed during inspection are repaired and reported. to. plant management prior to returning the systems to an operable status.
(c) There were no known failures of the valves listed in.
(4)(a) above prior to the performance of the initial valve integrity verification summarized in (5) below.
(5)
In response to " Required Action No.
5", Public Service Company submits the following:
(a) On May 12, 1983 and May 16,
- 1983, initial valve integrity verifications were performed as described in (4)(b) above.
The "As Found" condition of each valve is listed below.
Valve No.
Condition As Found V-42815 Frozen 3/4" Off Seat V-45813 Free Disk Movement V-42816 Free Disk Movement V-45814 Frozen 1/4" Off Seat V-42813 Frozen Mid position V-45811 Frozen Mid position V-42814 Frozen Mid position V-45812 Frozen Mid position
I Mr. John Collins P-83201 (b) An accumulation of rust and corrosion around the hanger and hanger pin inhibited free movement of the hanger and disc assembly in the check valves found defective.
(c) For more detail, refer to Fort St. Vrain Reportable Occurrence 83-017 (Report No. 50-267/83-017/01-T-0).
If you have any questions, please contact Mr. Don Warembourg at (303) 785-2224.
1 Sincerely, r0 W
- 0. R. Lee Vice President Electric Production i
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CITY AND COUNTY OF DENVER)
- 0. R. Lee, being first duly sworn, deposes and says; That he is Vice President of Electric Production of Public Service Company of
- Colorado, the Licensee herein; that he has read the foregoing
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and knows the contents thereof, and that the statements and matters set forth therein are true and correct to the best of his knowledge, information and belief.
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- 0. R. Lee Subscribed and sworn to before me this 8 day of June, 1983.
Witness my hand and official seal.
My commission expires:
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