ML19324A026
| ML19324A026 | |
| Person / Time | |
|---|---|
| Site: | Dresden, Quad Cities  |
| Issue date: | 04/18/1980 |
| From: | James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Reed C COMMONWEALTH EDISON CO. |
| References | |
| NUDOCS 8006200110 | |
| Download: ML19324A026 (1) | |
Text
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UNITED STATES TIC e
NUCLEAR REGULATORY COMMISSION o
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REGION 111 P
799 ROOSEVELT ROAD e
GLEN ELLYN, ILLINOIS 60137 APR 181980 Docket Nos. 50-10, 50-237, 50-249 50-254, and 50-265 Commonwealth Edison Company ATTN:
Mr. Cordell Reed
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Vice President Post Office Box 767 i
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Chicago, IL 60690 Gentlemen:
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The enclosed Circular No. 80-08 is forwarded to you for information.
No written response is required. Should you have any questions related to your understanding of the recommendations on this matter, please con-
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tact this office.
Sincerely, A'^
On-n & $^^5r
[famesC.Kepp1 Director s
Enclosure:
IE Circular No. 80-08 cc w/ encl:
Mr. D. L. Peoples, Director Director, NRR/ DOR of Nuclear Licensing PDR
' Mr. B. B. Stephenson, Local PDR Station Superintendent NSIC Mr. N. Kalivianakis, TIC Plant Superintendent Mr. Dean Hansell, Office of Central Files Assistant Attorney General Director, NRR/DPM Myron M. Cherry, Chicago
SSINS No.: 6830 Accession No.:
UNITED STATES m fM fl00 Q g.,
NUCLEAR REGULATORY COMMISSION 0FFICE OF INSPECTION AND ENFORCEMENT W
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J WASHINGTON, D.C. 20555 April 18, 1980 IE Circular No. 80-08 BWR TECHNICAL SPECIFICATION INCONSISTENCY - RPS RESPONSE TIME Descr iption of Ci cumstances:
On March 10, 1980, Vermont Yankee (VY) notified the NRC that the reactor protection system (RPS) response time of 100 milliseconds (from sensor contact opening to and including scram solenoid relay contact opening) specified in 1
the Technical Specification is inconsistent with the value of 50 milliseconds used in the safety analysis. VY verified + 9 t actual response times have been below 50 milliseconds since initial plant operation and initiated a Technical Spcification change request and plant procedure changes. VY reported that a j
letter from General Electric Company (GE) informed them of the inconsistency and that the problem may be generic.
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Our followup indicates that GE BWR facii* ties which have Technical Specifications similar to that discussed above may be affected.
Based on RPS design and test results, actual'.RPS response times are expected to be less than 50 milliseconds.
For GE BWR's, we request that you take the following corrective action promptly after receipt of this Circular: (1) verify that the actual RPS response time in the most recent test is less than the value specified in the safety analysis, (2) observe the RPS response time value specified in the safety analysis until a Technical Specification change (if necessary) is approved, and (3) take appropriate actions to make Technical Specification on RPS response time consistent with the RPS response time used in the safety analysis.
If a value less than that currently in the Technical Specifications is proposed, the licensee will be expected to provide the basis for that value, including the validity of tests and methods.
No written response to this Circular is required, however, IE will inspect licensee corrective action.
If you require additional information regarding this matter, contact the Director of the appropriate NRC Regional Office.
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i IE Circular No. 80-08 Enclosure April 18, 1980 RECENTLY ISSUED IE CIRCULARS Circular Subject Date of Issued to j
No.
Issue 80-07 Problems with HPCI Turbine 4/3/80 All holders of a power Oil System reactor OL or CP 1
80-06 Control and Accountability 4/14/80 Medical licensees in Systems for Implant Therapy Categories G and G1 i-Sources
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80-05 Emergency Diesel-Generator 4/1/80 All holders of a power Lubricating Oil Addition and reactor OL or CP Onsite Supply 80-01 Securing of Threaded Locking 3/14/80 All holders of a power Devices on Safety-Related reactor OL or CP Equipment 80-03 Protection from Toxic Gas 3/6/80 All holders of a Hazards power reactor OL 80 02 Nuclear Power Plant Staff 2/1/80 All holders of Reactor 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,
Shock Arrestor Strut 12/20/79 All licenseet and Assembly Interference holders of power reactor cps 79-24 Proper Installation and 11/26/79 All Holders of a Calibrai. ion 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
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