ML19260C682
| ML19260C682 | |
| Person / Time | |
|---|---|
| Site: | Columbia, Washington Public Power Supply System, Satsop  |
| Issue date: | 12/20/1979 |
| From: | Engelken R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| To: | Strand N WASHINGTON PUBLIC POWER SUPPLY SYSTEM |
| References | |
| NUDOCS 8001080302 | |
| Download: ML19260C682 (1) | |
Text
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UNITED STATES 8 }*.,7 g
NUCLEAR REGULATORY COMMISSION 5,'-
.j REGION V o '-
1990 N. CAUFORNI A BOULEVARD
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SUITE 202, WALNUT CRE E K PLAZA e,,,e WALNUT CREE K, CALIFORNI A 94596 December 20, 1979 Docket fios. 50-397, 50-460, 50-513, 50-508, 50-509 Washington Public Power Supply System P. O. Box 968 3000 George Washington Way Richland, Washington 99352 Attention: Mr. N. O. Strand Managing Director Gentlemen:
The enclosed Circular 79-25 is forwarded to you for information.
No written response to this Circular is required.
If you require additional information regarding this subject, please contact this office.
Sincerely,
{
~~;GC-R. H. Engelken Director
Enclosures:
1.
IE Circular No. 79-25 2.
List of IE Circulars Recently Issued cc w/ enclosures:
A. D. Kohler, WPPSS G. C. Sorensen, WPPSS J. P. Thomas, WPPSS W. J. Talbott, WPPSS M. E. Witherspoon, WPPSS 1702 318 800108o 3..
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SSIflS:
6830 Accession flo: 7910250514 UflITED STATES j9 fiUCLEAR REGULATORY COMtilSS10fl N
u 0FFICE OF If;SPECTI0f! AfiD EflFORCEMEtlT WASHIflGT0ft, D.C.
20555 December 20, 1979 IE Circular No. 79-25 SHOCK ARREST 0R STRUT ASSEMBLY IflTERFEREllCE The Bergen Paterson Pipesupport Corporation reported to the flRC a potential problem with their nechanical shock arrector
" Strut Assembly." The Berqen Paterson, Part 2540 Strut Assembly, is being used as a rear bracket for different sizes of Pacific Scientific Company (PSCO) mechanical shock arrestors.
Some of these shock arrestor sizes may not function as intended due to insufficient clearances. The following problems were identified:
For PSCO shock arrestors sizes 15 and 50, the Bergen Paterson Part 2540 Strut Assembly does not provide sufficient clearance for the shock arrestog to function freely, when installed at an off axis angle areater than 83.
For ZSCO shock arrestor size 120 there is insufficient clearance throughout 0
the 180 installation anale.
For PSCO shock arrestor sizes 50 and 120 with Beraen Paterson Adaptor Part 2108 the shock arrestor unit may sustain functional damaae when the adaptor unit comes in contact with the rear of the snubber, causino distortion of the end dust cover.
PSCO shock arrestors sizes
.35,
.65, 1.5 and 6 do not have this interference condition and therefore are not part of the potential problen of this circular.
Bergen Paterson stopped shipment as of October 1979 of all Part 2540-15, 2540-50, and 2540-120 strut assemblies and is reviewing all applicable desian detail drawings, to identify all affected items and the facilities to which those items have been delivered.
Licensees and holders of con:truction permits are advised to proceed with the inspection of Pacific Scientific ftechanical Shock Arrestor installations with Bergen Paterson Part 2540-15, 2540-50 and 2540-120 Strut Assemblies and deter-mine whether any of the following conditions are applicable:
1.
The shock arrestor installatica orientation presents a possible interference nroblem.
2.
Inspection of shock arrestors 50 and 120 with adaptor show damaaed or deformed snubber.
Corrective action should be coordinated with the Strut Assembly supplier (Bergen Paterson) and apDropriate resolutions promptly implemented.
1702 319
P
'44 IE Circular No. 79-25 Enclosure December 20, 1979 RECENTLY ISSUED IE CIRCULARS Circular Subj ect Date of Issued to No.
Issue 79-24 Proper Installation and 11/26/79 All Holders of a Calibration of Core Spray Power Reactor OL or Pipe Break Detection CP Equipment on BWRs.
79-23 Motor Starters and 11/26/79 All Power Reactor and Contactors Failed Operating Facilities and Holders of to Operate Reactor cps 79-22 Stroke Times for Power 11/16/79 All Power Reactor Operated Relief Valves Operatina Facilities and all Utilities having a CP 79-21 Prevention of Unplanned 10/19/79 All holders of Power Releases of Radioactivity Reactor OLs and cps 79-20 Failure of GTE Sylvania 9/24/79 All holders of Power Relay, Type PM Bulletin Reactor OLs and cps 7305, Cataloq 5U12-11-AC with a 12V AC Coil 79-19 Loose Lockinq Devices 9/13/79 All Holders of Power on Ingersoll-Rand Pumps Reactor OLs and cps 79-18 Proper Installation of 9/10/79 All Holders of Power Tarnet Rock Safety-Relief Reactor OLs and cps 79-17 Contact Problem in SB-12 8/14/79 All Power Reactor Switches on General Electric Licensees with a CP Company t'etalclad Circuit and/or OL Breakers 79-16 Excessive Radiation Exposures 8/16/79 All Radicaraphy To Membars Of The General Public Licensees And A Radiographer 79-15 Burstino of Hiqh Pressure Hose 8/8/79 All Materials Priority I, and Malfunction of Relief Fuel Cycle and Operatina Valve "0" Ring in Certain Self-Power Reactor Licensees Contained Breathinq Apparatus 1702 320