ML20206G555
| ML20206G555 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 11/08/1988 |
| From: | Ernst M NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Murley T Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8811220313 | |
| Download: ML20206G555 (2) | |
Text
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MEMORANDUM FOR:
Thomas E. Murley, Director, Office of Nuclear Reactor Regulation James M. Taylor, Deputy Executive Director for Regional Operations James Lieberman, Director Office of Enforcement FROM:
Malcolm L. Ernst, Acting Regional / tinistrator, Region 11
SUBJECT:
ENFORCEMENT DISCRETION FOR E. 1. HATCH NUCLEAR PLANT UNIT 2, DOCKET NO. 50-366 The purpose of this memorandum is to document that on October 26, 1988, Georgia Power Company (GPC) was verbally granted temporary relief from compliance with Technical Specifiution limiting condition for operation (LCO) 3.5.2, action statement b, which requires the unit to be in at least H0T SHUTDOWN within 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> and the steam dome pressure to be reduced to less than or equal to 150 psig within the next 24. hours if two or more of the required automatic depressurization system (ADS, valves are inoperable, it was determined that the failure of station battery A coincident with a certain sized loss-of-coolant accident (LOCA) would prevent the automatic actuation of ADS.
As describe.d in Enclosure 2, the decision to grant discretionary enforcement action was based on the foliowing:
(1) the low probability of the failure mode coincident with a pipe break of a critical size during the time frame required to modify the design (2) the fact that the high pressure coolant injection system would still be available to mitigate a postulated LOCA for small or intermediate break sizes, (3) the fact that manual actuation of ADS could still be accomplished within a reasonable time frame, and (4) the fact that the shif t supervisors and plant operators had been briefed on the design deficiency and i
the potential of the single failure to disable ADS.
The discretionary
- e. Arcement action allowed GPC to continue operation of Hatch Nuclear Plant Unit 2 until a design change could be implemented to correct a design deficiency in the ADS power supply circuitry.
During a second conference call on October 27, 1988, GPC comitted to shut down Unit 2 and implement the proposed modifications prior to January 1,1989. The licensee also comitted to perform the proposed modifications on Unit 1 prior to restarting the reactor at the end of the current refueling outage, t.hich is presently scheduled for December 5, 1988.
The GPC letter dated November 1, 1988 (Enclosure 2), was reviewed to ensure l
that GPC and the NRC were in agreement regarding the extent of the enforcement discretion.
A telephone conversation between L. Trocine of my staff and J. D. Heidt of GPC on November 2,1988, also confirmed the agreement of the applicable technical specification since it was not specified in GPC's letter.
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I grt..'.ted this enforcement discretion on October 26, 1988, with the concurrence of G. C. Lainas of NRR following technical discussions with G. C. Lainas, K. T. Eccleston, D. B. Matthews, and K. N. Jabbour of the Office of Nuclear Reactor Regulation (NRR); me, L. A. Reyes, C. W. Hehl, E. W. Merschoff, V. L. Brownlee, M. B. Shymiock, R. D. Starkey, J. E. Menning, R. A. Musser, and L. Trocine of Region 11 (Rll); and J. D. Heidt, H. L. Sumer, Jr., S. B. Tipps, and other members of the GPC staff.
The time frame and extent of the enforcement discretion were discussed on October 27, 1988, with D. B. Matthews and J. B. Hopkins of NRR, C. W. Hehl, E. W. Merschoff, M. V. Sinkule, M. B. Shymlock, R. D. Starkey, and J. E. Menning of RII; and H. C. Nix, Jr.,
J. D. Heidt, H. L. Summer, Jr.,
and other members of the GPC staff.
W. Troskoski of the Executive Director for Operation's Office was also informed.
For information regarding this matter, please contact M. V. Sinkule of my staff at extension 5506.
,{1' ll; Malcolm L. Ernst
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Enclosures:
1.
NRC letter to GPC dated November 8, 1988 2.
GPC letter to NRC dated November 1, 1988 cc w/encis:
W. Troskoski, E00 S. A. Varga, NRR G. C. Lainas, NRR D. B. Matthews, NRR L. P. Crocker, NRR bec w/encis:
L. A. Reyes, DRP A. F. Gibson, DRS G. R. Jenkins, EICS M. V. Sinkule, DRP J. E. Menning DRP L. Trocine, DRP R
R1 Ril
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Rll LTrocine HSinkule VBrownlee Re es AG'ibson GJe kins JSt6 r 11/' /E8 11/ /88 11/ 7 /88 11/7/8811
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