ML17053B422
| ML17053B422 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 01/31/1980 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Rhode G NIAGARA MOHAWK POWER CORP. |
| References | |
| NUDOCS 8002260051 | |
| Download: ML17053B422 (6) | |
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Docket No.
50-410 UNITEDSTATES NUCLEAR REGULATORY COMMISSION REGION I 631 PARK AVENUE KING OF PRUSSIA, PENNSYLVANIA19406 J~N 3 r >98o Niagara Mohawk Power Corporation ATTN:
Mr. G.
K.
Rhode Vice President System Project Management 300 Erie Boulevard, West
- Syracuse, New York l3202 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.
Si.ncerely, Boyce H. Grier Director
Enclosures:
l.
IE Circular No. 79-25, Supplement A
2.
List of Recently Issued IE Circulars CONTACT:
L.
E. Tripp (215-337-5282) cc w/encls:
Eugene B. Thomas, Jr.,
Esquire Soomapp
ENCLOSURE 1 SSINS No.:
6830 Accession No.:
UNITED STATES 7912190658 NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON, D. C.
20555 IE Circular No. 79-25 Supplement A
Date:
January 31, 1980 Page 1 of 1 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 ¹1 Shearon Harris ¹1, 2, 3, 8 4 Virgil C.
Summer ¹1 Limmerick ¹1 8 2
Three Mile Island ¹2 Watts Bar ¹1 Waterford. ¹3 During the 'course of this investigation Bergen-Paterson identified an additional problem with the 2540-120 Shock Arrestor Strut Assembly.
The assembly may not be acceptable for applications up to the published load of 120,000 lbs.
Preliminary load testing has indicated that the maximum acceptable load may be only 112,000 lbs.
All Nuclear Power Reactor 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.
ENCLOSURE 2 IE Circular No. 79-25 Supplement A
Date:
January 31, 1980 Page 1 of 1 RECENTLY ISSUED IE CIRCULARS Circular No.
79-17 Subject
'ontact Problem in SB-12 Switches on General Electric Metalclad Circuit Breakers First Date of Issue 8/14/79 Issued To All Power Reactor Licensees with an Opera-ting License (OL) or Con-struction Permit (CP) 79-18 79-19 79"20 79-21 79"22 79-23 79-24 Proper Installation of 9/10/79 Target Rock Safety-Relief Valves Loose Locking Devices 9/13/79 on Ingersoll-Rand Pumps Failure of.GTE Sylvania 9/24/79 Relay,, Type PM Bulletin 7305, Catalog 5U12-ll-AC with a 120V AC Coil Prevention of'nplanned 10/19/79 Releases of Radioactivity Stroke Times for Power ll/16/79 Operated Relief Valves Motor Starters and Con-11/26/79 tactors Failed to Op-
.erate Proper Installation and 11/26/79 Calibration of'ore Spray'Pipe Break Detection Equipment on BMRs
.All Power Reactor
.Licensees with an OL or CP All Power Reactor Licensees with an OL or CP All Power Reactor Licensees
" with an OL or CP All Power Reactor Licensees with an OL or CP All Power Reactor Licensees with an OL or CP All Power Reactor Licensees with an OL or CP All Power Reactor Facilities with an OL or CP 79"25 Shock Arrestor Strut Assembly Interference 12/20/79 All Power Reactor Faci-lities with an OL or CP 80-01 Service Advice for GE 1/17/80 Induction Disc Relays All Power Reactor Faci-lities with an OL or CP 80-02 Nuclear Power Staff Work Hours 2/1/80 All Power Reactor Faci-lities with an OL or CP