ML18079B069
| ML18079B069 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 09/24/1979 |
| From: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Schneider F Public Service Enterprise Group |
| References | |
| NUDOCS 7910090607 | |
| Download: ML18079B069 (4) | |
Text
'-~-.*-* :""!.
UNITED STATES NUCLEAR REGULATORY COMMISSION REGION I 631 PARK AVENUE KING OF PRUSSIA, PENNSYLVANIA 19406
~'r 2 4 1979, Public Service Electric and Gas Company ATTN:
Mr. F. W. Schneider Vice President - Production 80 Park Place Newark, New Jersey 07101 Gentlemen:
The enclosed Circular No. 79-20, is forwarded to you for information.
No written response is required.
Should you have any questions related to your understanding of this matter, please contact this office.
Sincerely,
~~
~
Boyce H. Grier f-----Di rector
Enclosures:
1.,
IE Circular No. 79-20
- 2.
List of IE Circulars Issued in the Last Six Months cc w/encls:
F. P. Librizzi, General Manager - Electric Production E. N. Schwalje, Manager - Quality Assurance.
R. L. Mittl, General Manager - Licensing and Environment H. J. Midura, Manager - Salem Generating Station
.ENCLOSURE 1 UNITED STATES AccessiOn No.: 7908220118 SSINS No.: 6830 NUCLEAR REGULATORY COMMISSION OFFICE OF INSPECTION AND ENFORCEMENT WASHINGTON,. D. C.
20555 IE Circular No. 79-20 Date:
September 24, 1979 Page 1 of 1 FAILURE OF GTE SYLVANIA RELAY, TYPE PM BULLETIN 7305, CATALOG 5Ul2-11-AC WITH A 120V AC COIL Description of Circumstances:
During inspection of relays in the Engineered Safeguards Actu.ation System at Metropolitan Edison Three Mile Island Nuclear Station Unit #1, relay 62X2B/RC1A failed to drop out when the coil was deenergized.
The failed relay would not prevent component starting but would have reduced the 2 of 3 co.incidence logic to 2 of 2, affecting Decay Heat Closed Cooling Pump A and Nuclear Services Closed Cooling Pump A or B.
The cause for failure was attributed to a notch in the armature operating rod.
The notch occurs where the rod vibrates against the magnet assembly due to coil hum.
A review of the hi story of this component indicates that similar relays failed during 1977 through 1979 at.least one of which was attributed to notching.
An inspection of forty-eight (48) relays by
.this licensee indicated that twenty-five (25) of the relays had detectable notches ranging from 0~001 to 0.003 inches deep.
Recommended Actions for Licensees' Consideration:
- 1.
Ensure that all GTE Sylvania Relays Type PM Bulletin 7305, with a 120V AC Cail used in or affecting the operation of safety-related equipment are examined to ensure that the armature operating rod is not notched and is operating freely.
- 2.
Relays found with detectable notches on the operating rod should be corrected. If correction cannot be accomplished then administrative controls should b.e initiated to assure demonstrated operation until the relay condition is corrected.
No written response to this Circular is required.. If you require additional information regarding this subject, contact the Director of the appropriate NRC Regional Office.
e ENCLOSURE 2 IE.Circular No. 79-20 Date:
September 24, 1979
- Page l of 2 LISTING OF IE CIRCULARS ISSUED IN LAST SIX MONTHS Circular Subject First Date Issued To No.
of Issue 79-06 Failure to Use Syringe 4/19/79 All Holders of and Bottle Shields in Medical Licenses Nuclear Medicine Except Teletherapy Licenses 79-07 Unexpected Speed 5/2/79 All BWR Power Reactor Increase of Reactor Facilities with an Recirculation MG Set OL or cp*
Resulted in Reactor Power Increase*
79-08 Attempted Extortion-5/18/79.
All Fuel Facilities Low Enriched Uranium and Licensed Reactors 79-09 Occurrences of Split 6/22/79 All Materials Priority or Punctured Regulator I, Fuel Cycle and Diaphragms in Certain Operating Reactor Self~Contained Licensees Breathing Apparatus 19-10 Pipefittings Manu-6/26/79 A l1 Power Reactor f actured from Facilities with an Unacceptable Material OL or CP 79-ll Design/Construction 6/27/79 All Applicants for, Interface Problem and Holders of CPs 79-12 Potential Diesel 6/28/79 All Power Reactor Generator Turbo-Facilities with an charger Problem OL or CP 79-13 Replacement of Diesel 7/16/79 All Power Reactor Fire Pump Starting Facilities with an Contactors OL or CP 79-14 Unauthorized Procure-
. 7/16/79 All Medical Licensees ment and Distribution except Teletherapy Medi-of Xenon-133 cal Licensees, and all Licensed Radiopharma-ceutical Suppliers Circular No.
79-15 79-16 79-17 79-18 79-19 2
IE Circular No. 79-20 Date:
September.24, 1979
- Page 2 of 2 LISTING OF lE CIRCULARS ISSUED IN LAST.SIX MONTHS Subject First Date of lssue
- aursting of High Pres-8/8/79 sure Hose*and Malfunc-tion o~ Relief Valve "O" Ring in Certain Self-Contained Breathing Apparatus Excessive Radiation 8/16/79 Exposures to Members Of The General Public And A Radiographer Contact Problem in 8/14/79 SB-12 Switches on General Electric Metalclad Circuit Breakers Proper Installation of 9/10/79 Target Rock Safety-Re lief Valves Loose Locking Devices 9/13/79 on Ingersoll-Rand Pumps Issued To All Materials Priority I, Fuel Cycle and Opera-
. ting Power Reactor licensees All Radiography Licensees A 11 Power Reacto.r licensees with an Ol
.or CP All Power Reactor licensees with an OL of CP All Power Reactor Licensees with an OL or CP