ML20059E423
| ML20059E423 | |
| Person / Time | |
|---|---|
| Site: | Arkansas Nuclear  |
| Issue date: | 10/26/1993 |
| From: | Milhoan J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| To: | Yelverton J ENTERGY OPERATIONS, INC. |
| References | |
| NUDOCS 9311030195 | |
| Download: ML20059E423 (5) | |
Text
m pA ILEC UNITED STATES NUCLEAR REGULATORY COMMISSION
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REGION IV 611 RYAN PLAZA DRIVE, SUITE 400 s
o, ARLINGTON, TEXAS 760114064 g
OCT 2 61993 Dockets: 50-313 50-368 Licenses: DPR-51 NPF-6 Entergy Operations, Inc.
ATTN:
J. W. Yelverton, Vice President Operations, Arkansas Nbclear One Route 3, Box 137G Russellville, Arkansas 72801 l
SUBJECT:
NOTICE OF ENFORCEMENT DISCRETION FOR ENTERGY OPERATIONS, INC.
REGARDING ARKANSAS NUCLEAR ONE, UNIT 2 (N0ED 93-4-002)
This acknowledges the granting of enforcement discretion to: Arkansas Nuclear
'One, Unit 2 (ANO-2), regarding compliance with the provisions of' Technical Specification Limiting Condition for Operation (LCO) 3.C.3. 'This specification requires that the condition requiring entry into LC0 3.0.3 be corrected within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> or action be initiated to shut down and place the
. plant in hot standby within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, in hot shutdown within the next 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and in cold shutdown within the following 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />.
At 5:19 p.m. (CDT) on October 22,1993, ANO-2 entered Technical Specification LC0 3.0.3 following your determination that the conditions of Technical Specification LC0 3.5.2, " Emergency Core Cooling System (ECCS) Subsystems -
Tavg a: 300 0F," and Technical Specification LC0 3.6.2.1, " Containment Spray System," could not be met.
Technical Specification 3.5.2 requires two independent ECCS subsystems to be operable when the average-reactor coolant system temperature is greater than.or equal to 300*F, and Technical-3 Specif9 ction 3.6.2.1 requires that two independent containment spray systems be ope... ole in Modes 1, 2, and 3.
Specifically,.you identified unscreened flowpaths into the ANO-2 containment sump,' which could allow material to enter the sump and potentially degrade the performance of ECCS subsystems and the containment spray system.
1 During a discussion between ANO, Region IV, and members of the Office of Nuclear Reactor Regulation, ANO formally requested. enforcement discretion to Technical Specification 3.0.3 in order to provide sufficient-time to complete '
temporary modifications to restore the containment sump to an operable condition. Enforcement discretion was granted verbally, based:upon our review of your written basis, at 8:13 p.m. (CDT) on October 22,-1993, by NRC Region IV. with the concurrence of the Office of Nuclear Reactor Regulation. < This enforcement discretion approved a 36-hour extension-to the shutdown requirements of Technical Specification 3.0.3.
This written basis was a
formally transmitted to this office by your letter (2CAN109308) dated
' October 23, 1993..The granting of this enforcement discretion was based on l
9311030195 931026 --
PDR ADOCK 050003131 e
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n Entergy Operations, Inc. the compensatory measures taken during this extension and your safety significance evaluation as described in your letter.
Specifically, the compensatory measures included actions by your staff to perform monitoring of the ANO-2 containment on an increased frequency to detect any potential reactor coolant system leakage, to maintain systems important to safety (identified in your letter) operable, and to limit maintenance on' ECCS systems during the affected period. Your safety significance evaluation concluded that the probability of a design basis loss of coolant accident (LOCA) occurring during the 36-hour extension, coupled with the relatively unaffected containment response capability in the event of a LOCA due to the availability of containment fan coolers, provided confidence that operation for 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> with the potential for degraded ECCS performance in the recirculation mode of operation was acceptable and did not pose an undue risk to public health and safety.
This action is taken in accordance with the " General Statement of Policy and Procedure for NRC Enforcement Actions," 10 CFR Part 2, Appendix C, dated March 17, 1993. This decision does not preclude the NRC from considering enforcement action for the conditions that led to the need for this Notice of Enforcement Discretion.
Please notify me imediately if your understanding differs from that set forth above.
Sincerely, o
mL.Wxl$ =
James L. Milhoan egional Administrator cc:
Entergy Operations, Inc.
ATTN: Harry W. Keiser, Executive i
-Vice President & Chief Operating Officer P.O. Box 31995 Jackson, Mississippi 39286-1995 Entergy Operations, Inc.
ATTN: John R. McGaha, Vice President Operations Support P.O. Box 31995 Jackson, Mississippi 39286 Wise, Carter, Child & Caraway ATTN: Robert 8. McGehee, Esq.
P.O. Box 651 Jackson, Mississippi 39205 j
Entergy Operations, Inc. Entergy Operations, Inc.
ATTN: James J. Fisicaro Director, Licensing Route 3, Box 137G Russellville, Arkansas 72801 Entergy Operations, Inc.
ATTN: Michael B. Sellman, General Manager, Plant Operations Route 3, Box 137G Russellville, Arkansas 72801 Honorable C. Doug Luningham County Judge of Pope County Pope County Courthouse Russellville, Arkansas 72801 l
Winston & Strawn ATTN: Nicholas S. Reynolds, Esq.
1400 L Street, N.W.
Washington, D.C.
20005-3502 Arkansas Department of Health ATTN: Ms. Greta Dicus, Director Division of Radiation Control and Einergency Management 4815 West Markham Street j
Little Rock, Arkansas 72201-3867 B&W Nuclear Technologies i
ATTN:
Robert B. Borsum Licensing Representative 1700 Rockville Pike, Suite 525 i
Rockville, Maryland 20852 Admiral Kinnaird R. McKee, USN (Ret)
.214 South M.
is Street Oxford, Mary' land 21654 ABB Combustion Engineering Nuclear Power.
ATTN:
Charles B. Brinkman Manager, Washington Nuclear Operations 12300 Twinbrcok Parkway, Suite 330 Rockville, Maryland 20852
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Entergy Operations, Inc. OCT 261993 bec to DMB (IE14) bec distrib. by RIV:
J. L. Milhoan Resident Inspector Section Chief (DRP/D)
Lisa Shea, RM/ALF, MS: MNBB 4503 MIS System DRSS-FIPS RIV File Section Chief (DRP\\TSS)
Project Engineer (DRP/D)
J. Lieberman, OE Associate Director for Projects, NRR Associate Director for Inspection and Technical Assessment, NRR Division Director, Division of Reactor Projects, NRR Technical Assistant, Division of Reactor Projects - I/II, NRR S/hd A
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'10/25/93 10/26/93 10/!4/93 10/ /93 10/gM93
- previously concurreT I
~ _ _ -
Entergy Operations, Inc. OCT 261993 "bec to DMB (IE14) bec distrib. by RIV:
J. L. Milhoan Resident Inspector Section Chief (DRP/D)
Lisa Shea, RH/ALF, MS: HNBB 4503 MIS System DRSS-FIPS RIV File Section Chief (DRP\\TSS)
Project Engineer (DRP/0)
J. Lieberman, OE Associate Director for Projects, NRR Associate Director for Inspection and Technical Assessment, NRR Division Director, Division of Reactor Projects, NRR Technical Assistant, Division of Reactor Projects - I/II, NRR 020018
..