ML19305A980
| ML19305A980 | |
| Person / Time | |
|---|---|
| Site: | Dresden, Byron, Braidwood, Quad Cities, Zion, LaSalle  |
| Issue date: | 01/31/1980 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Reed C COMMONWEALTH EDISON CO. |
| References | |
| NUDOCS 8003190007 | |
| Download: ML19305A980 (1) | |
Text
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UNITED STATES E"
3, NUCLEAR REGULATORY COMMISSION M
M
.. E REGION lli 799 ROOSEVELT ROAD
%.....o GLEN ELLYN. ILLINOIS 60137
@ 31 ' add 50-23i, 50-2 !9, DocketNos.Sf-1 50-25(/j 50-265,50-245,50d04,50-b3,/
50-37f, 50-4)4, 50-4$5, 50-486 and 50457 Commonwealth Edison Company ATTN:
Mr. Cordell Reed Vice President Post Office Box 767 Chicago, IL 60690 Gentlemen:
The enclosed IE Circular No. 79-25, Supplement A, is forwarded to you for information. No written response to this Circular is required.
If you have any questions related to the subject, please contact this office.
Sincerely, 4bM ames G. Keppl r Director
Enclosure:
IE Circular No. 79-25, Supplement A cc w/ encl:
Mr. D. L. Peoples, Director Mr. Gunner Sorensen, Site of Nuclear Licensing Project Superintendent Mr. B. B. Stephenson, Mr. R. Cosaro, Project Station Superintendent Superintendent Mr. N. Kalivianakis, Central Files Station Superintendent Director, NRR/DPM Mr. N. Vandke, Station Director, NRR/ DOR Superintendent PDR Mr. L. J. Burke, Site Local PDR Project Superintendent NSIC Mr. T. E. Quaka, Quality TIC Assurance Supervisor Mr. Dean Hansell, Office Mr. R. H. Holyoak, Station of Assistant Attorney Superintendent General 3003190 0 97
O SSINS No.:
6830 Accession No.:
UNITED STATES 7912190658 NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D.C.
20555 January 31, 1980 IE Circular No. 79-25 Supplement A SHOCK ARRESTOR STRUT ASSEMBLY INTERFERENCE On December 20, 1979 licensees and holders of construction permits for nuclear power reactors were advised by IE Circular No. 79-25 of a potential problem with Bergen Paterson part 2540 Strut Assembly used in combination with Pacific Scientific Company mechanical shock arrestors sizes 15K, 50K and 120K.
Bergen Paterson has conducted a detailed review of their records and identified the following nuclear power plants as being' affected by the above problem:
Shoreham #1 Three Mile Island #2 Shearon Harris #1, 2, 3, & 4 Watts '3ar #1 Virgil C. Summer #1 Waterford #3 Limmerick #1 & 2 During the course of this investigation Bergen-Paterson identified an additional problem with the 2540-120 Shock Arrestor Strut Assemb',. The assembly may not be acceptable for applications up to the publisned load of 120,000 lbs.
Preliminary load testing has indicated that the maximum accept-able load may be only 112,000 lbs.
All Nuclear Power Reac'.ur licensees and holders of construction permits are advised to review their systems for any Bergen Paterson part 2540-120 Shock Arrester Strut Assembly.
Application of these assemblies should be analysed, existing calculations reviewed, and if necessary, recalculated to determine whether loads exceed 112,000 lbs.
Strut Assemblies for applications in excess of 112,000 lbs should be replaced by larger units or other acceptable resolution should be made.
l i
a IE Circular No. 79-25 Supplement A Enclosure January 31, 1980 e
RECENTLY ISSUED IE CIRCULARS Circular Subject Date of Issued to No.
Issue 80-02 Nuclear Power Plant 2/1/80 All holders of Reactor Staff Work Hours OLs including research and test reactors, and cps 80-01 Service Advice for GE 1/17/80 All licensees of Induction Disc Relays nuclear power reactor operating facilities and holders of nuclear power reactor cps 79-25 Shcok Arrestor Strut 12/20/79 All licensees and Assembly Interference holders of power reactor cps 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 to Operate and Holders of Reactor cps 79-22 Stroke Times for Power 11/16/79 All Power Reactor Operated Relief Valves Operating 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, Catalog SU12-11-AC with a 12V AC Coil 79-19 Loose Locking Devices 9/13/79 All Holders of Power on Ingersoll-Rand Pumps Reactor OLs and cps i
79-18 Proper Installation of 9/10/79 All Holders of Power Target Rock Safety-Relief Reactor OLs and cps
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