ML19296C430
| ML19296C430 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 01/31/1980 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Woolever E DUQUESNE LIGHT CO. |
| References | |
| NUDOCS 8002260038 | |
| Download: ML19296C430 (1) | |
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o UNITED STATES
- k NUCLEAR REGULATORY COMMISSION 4 m 3
E REGION I f
631 PARK AVENUE o
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,e KING OF PRUSSIA, PENNSYLVANIA 19406 Docket No. 50-412 d4N 3 1 ISSO Duquesne Light Company ATTN:
Mr. E. J. Woolever Vice President 435 Sixth Avenue Pittsburgh, PA 15219 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, C
P
~
Boyce H.
rier Director
Enclosures:
1.
IE Circular No. 79-25, Supplement A 2.
List of Recently Issued IE Circulars CONTACT:
L. E. Tripp (215-337-5282) cc w/encis:
R. J. Washabaugh, Quality Assurance Manager 8002260 03E
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 SH0CK ARREST 0R 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 Bar #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 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 Subject First Date Issued To No.
of Issue 79-17 Contact Problem in 8/14/79 All Power Reactor SB-12 Switches on Licensees with an Opera-General Electric ting License (OL) or Con-Metalclad Circuit struction Permit (CP)
Breakers 79-18 Proper Installation of 9/10/79 All Power Reactor Target Rock Safety-Licensees with an OL Relief Valves or CP 79-19 Loose Locking Devices 9/13/79 All Power Reactor Licensees on Ingersoll-Rand Pumps with an OL or CP 79-20 Failure of GTE Sylvania 9/24/79 All Power Reactor Licensees Relay, Type PM Bulletin with an OL or CP 7305, Catalog SU12-11-AC with a 120V AC Coil 79-21 Prevention of Unplanned 10/19/79 All Power Reactor Licensees Releases of Radioactivity with an OL or CP 79-22 Stroke Times for Power 11/16/79 All Power Reactor Licensees Operated Relief Valves with an OL or CP 79-23 Motor Starters and Con-11/26/79 All Power Reactor Licensees tactors Failed to Op-with an OL or CP erate 79-24 Proper Installation and 11/26/79 All Power Reactor Calibration of Core Facilities with an OL or Spray Pipe Break CP Detection Equipment on BWRs 79-25 Shock Arrestor Strut 12/20/79 All Power Reactor Faci-Assembly Interference lities with an OL or CP 80-01 Service Advice for GE 1/17/80 All Power Reactor Faci-Induction Disc Relays lities with an OL or CP 80-02 Nuclear Power Staff 2/1/80 All Power Reactor Faci-Work Hours lities with an OL or CP