ML20034G484
| ML20034G484 | |
| Person / Time | |
|---|---|
| Site: | Zion File:ZionSolutions icon.png |
| Issue date: | 03/02/1993 |
| From: | Zwolinski J Office of Nuclear Reactor Regulation |
| To: | Kovach T COMMONWEALTH EDISON CO. |
| References | |
| TAC-M85831, NUDOCS 9303090580 | |
| Download: ML20034G484 (5) | |
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NUCLEAR REGU!.ATORY COMMISSION :
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Ma.ch 2. 1993
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l Docket Nos. 50-295 and 50-304 1
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.I Mr. Thomas J. Kovach i
t Nuclear Licensing Manager.
1 Commonwealth-Edison Company-Suite 300 OPUS West III l
1400 OPUS Place 1
Downers Grove, Illinois 60515
Dear Mr. Kovach:
SUBJECT:
ZION STATION, UNIT 1 - TEMPORARY WAIVER OF COMPLIANCE FROM TECHNICAL f
SPECIFICATIONS SECTION 3.8.9.b. (TAC NO. M85831).
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This letter confirms the granting of a Temporary Waiver of Compl'iance (TWOC) l from the Technical Specifications (TS) requirement contained in the Zion l
Nuclear Power Station, Unit 1, TS Section 3.8.9.b, " Limiting Condition for Operation," (LCO) which requires that if less than one channel of the Containment Recirculation Sump Level. Instrumentation (CRSLI) is-operable,.
i and if a channel can not be restored to operable status within '48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />,. the reactor must be placed.in at least Mode 4 within the next-12 hours.
A TS amendment was issued on January 27, 1993, with an implementation date of February 26, 1993, that'added certainl instrumentation calibration requirements to Tables 3.8.9-1 and 4.8.9-1;' including a calibration frequency for the CRSLI of 18 months.
Prior to the amendment.being issued, calibration of.these instruments was administratively controlled, with a frequency of 36 months.
At the time of Commonwealth Edison Company's -(Ceco) review of the TS change request in February 1992, the CRSLI were within the proposed 18 month calibration frequency since they had last been calibrated in March 1991.
t However, the calibration frequency was left at 36 months instead of. being changed to 18 months to be consistent with the TS change request. -If the y
calibration frequency had been changed,' the CRSLI would have been calibrated during the Unit I refueling outage in the spring of'1992'and, upon
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implementation, the CRSLI would have met the requirements of. the: amendment.
Prior to the amendment -implementation date, it was discovered that the Unit I
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l CRSLI would not be within the required' calibration frequency upon the amendment's implementation.
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Mr. Thomas J. Kovach f
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In a telephone call on February 25, 1993, the need for this TWOC was discussed with the NRC staff.
This conversation was followed by a letter dated
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February 26, 1993, in which CECO formally requested that it be allowed to delay the performance of the Channel Calibration _ requirements of Specification 4.8.9 for the two Unit 1 CRSLI pending issuance of a TS amendment, on a l
routine basis, that grants a one-time extension to the CRSLI_ Channel Calibration requirements until the next Unit I refueling outage, currently scheduled for the fall of 1993, or a forced outage of Unit I to Mode 3 occurs.
I understand that, during the period of time that this TWOC is in effect, Zion i
Nuclear Power Station will take the following compensatory actions to ensure the plant is maintained in a safe and stable condition:
i a.
Containment water level (wide range) instrument channels and refueling I
water storage tank (RWST) level instrument channels shall bc maintained operable in accordance with Specification 3.8.9.
b.
Appropriate operating personnel will be notified to ensure these actions i
are maintained.
In a telephone conversation at 1:45 PM (CST) on February 26, 1993, the NRC staff granted the requested relief.
By copy of this letter, the NRC is confirming the granting of your request for a Temporary Waiver of Compliance j
to delay the performance of the Channel Calibration requirements of Specification 4.8.9 for the two Unit 1 Containment Recirculation Sump Level Instruments pending issuance'of a TS amendment, on a routine basis, that grants a one-time extension to the CRSLI Channel Calibration requirements-until the next Unit I refueling outage, currently scheduled for the fall of 1993, or a forced outage of Unit 1 to Mode 3.
This TWDC is effective j
immediately, to expire at 5:00 PM (CST) on June 30, 1993, which will allcw sufficient time for Ceco to submit, and the NRC staff to review, a TS amendment request for a one-time extension to the Containment Recirculation i
Sump Level Instrumentation Channel Calibration requirements until the next Unit I refueling outage currently scheduled for the fall of 1993.
The NRC's basis for granting this Temporary Waiver of Compliance is its
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agreement with the CECO determination that the calibration record of the CRSLI is a history of proven reliability. The NRC staff considers it to be in the interests of the health and safety of the public to grant the TWOC to avoid putting Unit I through the unnecessary thermal transient of a reactor shutdown.
Performance of the Channel Calibrations with the reactor at power is also not a desirable option due to the high radiation dose which would be incurred by personnel performing the calibration. To resolve this issue, Ceco has also committed to submit a TS change request by March 5, 1993, that will request a one-time extension to the CRSLI Channel Calibration requirements until the next Unit I refueling outage.
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i Mr. Thomas J. Kovach The requested relief was granted at 1:45 PM (CST) on February 26, 1993, to
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Richard Tuetken of the Zion Station staff. The TWOC was effective immediately, and will remain valid until 5:00 PM (CST) on June 30, 1993.
Sincerely, Original Signed by John A. Zwolinski John A. Zwolinski, Assistant Director for Region 111 Reactors Division of Reactor Projects - Ill/IV/V Office of Nuclear Reactcr Regulation r
cc:
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PDIll-2 r/f T. Murley F. Miraglia J. Partlow J. Lieberman, OE J. Roe J. Zwolinski i
J. Dyer C. Moore C. Shiraki OGC D. Hagan G. Hill (4)
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Mr.-Thomas J. Kovach Zion Nuclear Power Station Commonwealth Edison Company-Unit Nos. I and 2 j
i CC:
Michael 1. Miller, Esquire Sidley and Austin l
One_ First National Plaza Chicago, Illinois 60690 Dc. Cecil Lue-Hing Director of Research tad Development Metropolitan Sanitary District cf Greater Chicago 100 East Erie Street Chicago, Illinois 60611 i
Phillip Steptoe, Esquire Sidley and Austin One First National Plaza i
Chicago, Illinois 60603 Mayor of Zion Zion, Illinois 60099 l
t Illinois Department of Nuclear Safety i
Office of Nuclear Facility Safety 103S Outer Park Drive Springfield, Illinois 62704 l
U. S. Nuclear Regulatory Commission Resident inspectors Office 105 Shiloh Blvd.
Zion, Illinois 60099 Regional Administrator, Region 111 i
U. S. Nuclear Regulatory Commission 3
799 Roosevelt Road, Bldg. #4 Glen Ellyn, Illinois 60137 s
Robert Neumann Office of Public Counsel l
State of Illinoi-Center 100 W. Randolph Suite 11-300 t
Chicago, Illinois 60601 9
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Mr. Thomas J. Kovach ;
i The requested relief was granted at 1:45 PM (CST) on February 26, 1993, to Richard Tuetken of the Zion Station staff. The TWOC was effective-immediately, and will remain valid until 5:00 PM (CST) on June 30, 1993.
Sincerely, Original Signed by John A. Zwolinski John A. Zwolinski, Assistant Director for Region 111 Reactors Division of Reactor Projects - Ill/IV/V Office of Nuclear Reactor Regulation cc:
See next page DISTRIBUTION:
Docket Files NRC & Local PDRs PDill-2 r/f T. Murley F. Miraglia J. Partlow J. Lieberman, OE J. Roe l
J. Zwolinski
-J. Dyer C. Moore C. Shiraki OGC D. Hagan G. Hill (4)
Wanda Jones C. Grimes ACRS (10)
OPA OC/LFDCB R. Hall M. Boyle B. Clayton, Rill E
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