ML20059K375
| ML20059K375 | |
| Person / Time | |
|---|---|
| Site: | LaSalle  |
| Issue date: | 01/25/1994 |
| From: | Greenman E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Murphy W COMMONWEALTH EDISON CO. |
| References | |
| NUDOCS 9402020064 | |
| Download: ML20059K375 (4) | |
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JAN 2 61931 Docket No. 50-373 License No. NPF-ll N0ED No. 94-3-002 Commonwealth Edison Company ATTN:
W. Murphy, Site Vice President LaSalle County Station 2601 North 21st Road Marseilles, IL 61341
SUBJECT:
NOTICE OF ENFORCEMENT DISCRETION FOR COMMONWEALTH EDIS0N COMPANY REGARDING LASALLE NUCLEAR STATION UNIT 1
Dear Mr. Murphy:
By letter dated January 20, 1994, you requested the U. S. Nuclear Regulatory Commission (NRC) to exercise its discretion not to enforce compliance with the required actions in Technical Specification (TS) 4.0.3.
Your staff informed the NRC on January 20, 1994, at 9:00 a.m. (CST) that three Reactor Protection System (RPS) instruments will exceed the specified monthly surveillance intervals and the allowed factor of 1.25 times the surveillance interval.
The RPS instrumonts are for the main steam line isolation valve (MSIV) closure; the turbine stop valve closure; and the turbine control valve fast closure, J
valve trip system oil pressure low. As a result of exceeding these surveillance test intervals, LaSalle Nuclear Station, Unit 1, would not be in compliance with TS 4.0.3 with regard to the operability of these instruments.
Specifically, your letter stated that at 6:00 p.m. on January 20, 1994, LaSalle Unit I would have entered TS 3.3.lb Action Statements due to the inoperability of these RPS instruments.
Limiting Condition for Operation action statement 3.3.1.b requires that with the number of operable RPS channels less than required by the minimum operable channels per trip system requirement for both trip systems, place at least one trip system in the tripped condition within one hour.
Further, the unit must be in at least the startup mode within six hours for the MSly valves' closure RPS instrument channels being inoperable. Additionally, a reduction in thermal power must be initiated within 15 minutes to reduce turbine first stage pressure to less than 14 psig, which is equivalent to less than 30% of rated thermal _ power, within two hours, for both the turbine stop valve closure, and the turbine control valve fast closure, valve trip system oil pressure low RPS instrument channels being inoperable.
You requested enforcement discretion for a period of 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> to extend the functional test interval for the RPS instrumentation to be able to restore the power. supply system reserve margin due to the high-system load demand caused by severe winter weather.
You provided as justification for continued operation that the safety significance associated with the duration of this request was minimal because the request for 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> additional time was being requested for monthly j
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surveillances. The last five surveillances were reviewed and verified to be satisfactory for these three systems.
In addition, you identified the compensatory measure that if an RPS instrument channel becomes inoperable during the time of the enforcement discretion, the TS actions will be followed.
Based on our review of your justification, including the compensatory measure identified above, the staff agreed to grant enforcement discretion for a 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> period. During this time weather conditions were expected to improve and it would allow time for you and other utilities to bring other sources of power onto the system grid to increase grid stability. The staff has concluded that this course of action involves the lowest safety impact to the reactor, and we are clearly satisfied that this course of action is warranted from a public health and safety perspective. Therefore, this letter documents our verbal granting on January 20, 1994, of our intention to exercise discretion not to enforce compliance with TS 4.0.3 for a 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> period from January 20, 1994, at 6:00 p.m. (CST) to 6:00 p.m. (CST) on January 22, 1994, to allow Commonwealth Edison to maintain system grid stability.
However, we will consider enforcement action, as appropriate, for the conditions that led to the need for this exercise of enforcement discretion.
Sincerely, c r ui:L _c a -
Edward G. Greenman, Director Division of Reactor Projects cc:
L. O. De1 George, Vice President, Nuclear Oversight and Regulatory Services D. J. Ray, Station Manager J. Lockwood, Regulatory Assurance Supervisor D. Farrar, Nuclear Regulatory Services Manager OC/LFDCB 1
Resident Inspectors LaSalle Dresden, Quad Cities Richard Hubbard i
J. W. McCaffrey, Chief, Public Utilities Division Licensing Project Manager, NRR Robert Newmann, Office of Public i
Counsel State Liaison Officer Chairman, Illinois Commerce Commission M6d bcc:' PUBLICi (IE04)._-
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surveillances. The last five surveillances were reviewed and verified to be satisfactory for these three systems.
In addition, you identified the compensatory measure-that if an RPS instrument channel becomes inoperable during the time of the enforcement discretion, the TS actions will be followed.
Based on our review of your justification, including the compensatory measure identified above, the staff agreed to grant enforcement discretion for a 48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> period.
During this time weather conditions were expected to improve and-it would allow time for you and other utilities to bring other sources of power onto the system grid to increase grid stability. The staff has concluded that this course of action involves the lowest safety. impact to the reactor, and we are clearly satisfied that this course of action is warranted from a public health and safety perspective.
Therefore, this letter documents our verbal granting on January 20, 1994, of our intention to exercise discretion not to enforce compliance with TS 4.0.3 for a.48 hour5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> period from January 20, 1994, at 6:00 p.m. (CST) to 6:00 p.m. (CST) on January 22, 1994, to allow Commonwealth Edison to maintain system grid stability.
However, we will consider enforcement action, as appropriate, for the conditions that led to the need for this exercise of enforcement discretion.
Sincerely, m,-
c}ugm.;. 2 Edward G. Greenman, Director Division of Reactor Projects-i
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L. O. DelGeorge, Vice President, Nuclear Oversight and Regulatory Services D. J. Ray, Station Manager J. Lockwood, Regulatory Assurance Supervisor D. Farrar, Nuclear Regulatory Services. Manager l
OC/LFDCB Resident Inspectors LaSalle Dresden, Quad Cities Richard Hubbard J. W. McCaffrey, Chief, Public Utilities Division Licensing Project Manager, NRR Robert Newmann, Office of Public Counsel f
State liaison Officer Chairman, Illinois Commerce Commission LaSalle PM, NRR J. W. Roe, Acting ADPR/NRR W. T. Russell, ADT/NRR J. A. Zwolinski, Acting DRPW/NRR r
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