ML19341B304
| ML19341B304 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 01/14/1981 |
| From: | Tedesco R Office of Nuclear Reactor Regulation |
| To: | Gary R TEXAS UTILITIES ELECTRIC CO. (TU ELECTRIC) |
| References | |
| NUDOCS 8101300621 | |
| Download: ML19341B304 (3) | |
Text
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NUCLEAR REGULATORY COMMISSION
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Docket Nos. 50-445/446 G
hw)8 l u JAN 141981 ge c
Mr. R. J Gary Executive Vice President and General Manager Texas Utilities Generating Company 2001 Bryan Tower Dallas, Texas 75201
Dear Mr. Gary:
SUEJECT: PRESERVICE INSPECTION AND TESTING OF SNUEBERS Due to a long history of problems dealing with inoperable and incorrectly installed snubbers, and due to the potential safety significance of failed i
snubbers. in safety related systems and components, it is requested that maintenance records for snubbers be documented as follows:
Pre-service Examination A pre-service examination should be made on all snubbers listed in tables 3.7-4a and 3.7-4b of Standard Technical Specifications 3/4.7.9.
This exami-nation should be made after snubber installation but not more than six months prior to initial system pre-operational testing, and should is a minimum verify the following:
(1) There are no visible signs of damage or impaired operability as a result of storage, handling, or installation.
i (2) The snubber location, orientation, positinn setting. and configuration (attachments, extensions, etc.) are according to design drawings and specifications.
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(3) Snubbers are not seized, frozen or janned.
I (4) Adequate swing clearance is provided to allow snubber movement.
(5) If applicable, fluid is to the recommended level and is not leaking from the snubber system.
l (6) Structural connections such as pins, fasteners and other connecting hardware such as lock nuts, tabs, wire, cotter pins are installed correctly.
8101800 M -
i JAN 141981 Mr. R. J. Gary If the period between the initial pre-service examination and initial system f
pre-operational test exceeds six months due to unexpected situations, Snubbers which are re-examination of items 1, 4, and 5 shall be performed.
installed incorrectly or otherwise fail to meet the above requirements must be repaired or replaced and re-examined in accordance with the above criteria.
Pre-Operational Testing During pre-operational testing, snubber thermal movements for systems whose operating temperature exceeds 253 F should be verified as follows:
During initial system heatup and cooldown, at specified temperature intervals for any system which attains operating temperature, verify (a) the snubber expected thermal movement.
For those systems which do not attain operating temperature, verify (b) via observation and/cr calculation that the snubber.will acccmmodate the projected thermal movement.
Verify the snubber swing clearance at specified heatup and (c) cause and corrected prior to proceeding to the next speciffeo interval.
intervals.
l The above described operability program for sndbbers.should be included and documented by the pre-service inspection and pre-operational test programs.
The pre-service inspection must be a prerequisite for the pre-operationalT testing of snubber thermal motion.
in Chapter 14 of the FSAR.
Sincerely, 2 50 %. 4.)
Robert L. Tedesco Assistant Director for Licensing Division of Licensing cc: See next page
e Mr. R. J. Gary Executive Vice President and General Panager Texas Utilities Generating Compar y JAll 141981 2001 Bryan Tower Dallas, Texas 75201 cc:
Nicholas S. Reynolds, Esq.
Mr. Richard L. Fouk,e Debevoise & Liberman Citizens for Fair _ Utility Regulation 1200 Seventeenth Street 1668-8 Carter Drive Washington, D. C.
20036 Arlington, Texas 76010 Spencer C..Relyea, Esq.
Resident Inspector / Comanche Peak Worsham, Forsythe & Samcels Nuclear Power Station 2001 Bryan Tower c/o U. S. Nuclear Regulatory Commission Dallas, Texas 75201 P. O. Box 38 Glen Rose, Texas 76043 Mr. Homer C. Schmidt Manager - Nuclear Services Texas Utilities Services, Inc.
2001 Bryan Tower Dallas, Texas.
75201 Mr. H. R. Rock Gibbs and Hill, Inc.
393 Seventh Avenue New York, New York 10001 Mr. A. T. Parker Westinghouse Electric Corporation-P. O. Box 355 Pittsburgh, Pennsylvania 15230 i
David J. Preister Assistant Attorney General Environmental Protection Division P. O. Box 12548, Capitol Station Austin,-Texas 78711 Mrs. Juanita Ellis, President Citizens Association -for Sound Energy 1426 South Polk l
Dallas, Texas 75224 Geoffrey M. Gay, Esq.
West. Texas Legal Services a06 W.'TJ Waggoner Building 810 Houstqa Street Fort Worth +, : Texas 76102 I
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