ML19225B282
| ML19225B282 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 05/09/1979 |
| From: | Justin Fuller PUBLIC SERVICE CO. OF COLORADO |
| To: | Seyfrit K NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| NUDOCS 7907240445 | |
| Download: ML19225B282 (2) | |
Text
CENTRAL FILES PDR:HQ g
1 public service company of oc x.h P.O. Box 840, Denver, Colorado -
May 9, 1979 Fort St. Vrain Unit No. 1 P-79102 Mr. Karl V. Seyfrit, Director Nuclear Regulatory Commission Region IV Office of Inspection and Enforcement 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011
Subject:
Docket No. 50-267 Valve Deficiencies
Reference:
AEC Operations Bulletin No. 74-1 Dated 1/3/74 PSC Letter Dated 3/29/74 PSC Letter Dated 8/5/74
Dear Mr. Seyfrit,
This letter is a report on our reinspection of all the Class I valves listed in Attachment A in accordance with our August 5.1974 letter to your office.
As stated in that letter, there were thirty air and motor operated valves identified that had weld or other defects at the bonnet-operator joint.
General Atomic Company performed the necessary repairs and Public Service Company's Quality Assurance Department reviewed and inspected the repairs.
RESULTS OF REINSPECTION Upon reinspection of the thirty valves, one 2 inch air operated Velan globe valve, HV-22134, was found to have a cracked tack weld between the valve yoke :nd the air operator mounting plate.
We have evaluated the defect's significance and it is our conclusion that if the weld failed the valve would still function properly.
Our decision was based upon a correspondance with a Mr. M. Abbas, a representative of Velan Engineering.
According to Mr. Abbas, the tack welds are only a t read locking device and they do not affect the operability of the valve.
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.P-79102 5/9/79 C0:lCLUSION The defective tack weld was replaced with a circumferential weld to eliminate the propensity for weld failure.
Due to the fact that the defective tack weld on HV-22134 would not have affected the operability of the valve had the defect gone undetected, and the other twenty nine valves reinspected revealed no deficiencies we feel no further action is required.
Based on the information presented in this letter, AEC Operations Bulletin No. 74-01 has no remaining open items and is ciosed by submittal of the attached document.
Very truly yours, J. K. Fuller, Vice President Engineering and Planning JKF/JG/sch 367 13 0
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