ML17180A940
| ML17180A940 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 08/19/1994 |
| From: | Greenman E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Delgeorge L COMMONWEALTH EDISON CO. |
| References | |
| NOED-93-3-003, NOED-93-3-3, NUDOCS 9410040106 | |
| Download: ML17180A940 (2) | |
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- UNITED STATES fl UCLEAR REGULATORY COMMISSIOr.A.
REGION Ill 799 ROOSEVELT ROAD GLEN ELLYN, ILUNOIS 60137-5927 Docket No.
50-249 License No. DPR-25
- NOED No. 93-3-003 Commonwealth Edison Company ATTN:
L. 0. OelGeorge AUG 1 9 1993 Vice President, Nuclear Oversight and Regulatory Services Executive Towers West III 1400 Opus Place, Suit~ 300 Downers Grove, IL 60515
SUBJECT:
NOTICE OF ENFORCEMENT DISCRETION FOR COMMONWEALTH EDISON COMPANY REGARDING. THE DRESDEN NUCLEAR STATION UNIT 3
Dear Mr. DelGeorge:
By letter dated August 17, 1993, you requested the u;s. Nuclea*r Regulatory Commission {NRC) to exercise its discretion not to enforce. compliance.with.the required actions in Technical Specification {TS) 3.5.B. Your staff informed the
- NRC on August 16, 1993, at_l~OO p.m. {COT) that the Dresden Nuclear Station; Unit 3, would not be in compliance with TS 3.5.B with. regard t6 "operable" containment cooling subsystem* loops within the specified allowable outage time.
Specifically, your letter stated that at 8:31 a.m. on August 16, 1993, Dresden
- Unit 3 entered Technical Specification 3.5.B.4 due to the inability of either Containment Cooling {CCSW) subsystem to attain the 7000 gpm design.flow (6000 gpm was measured in the A-loop and calculated in the 8-loop) required bY.FSAR Table
~;2.4.1. LCO 3.5.B.4 required the Unit to be placed i~ a Cold Shutdown condition within 24 flours.* The 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> time limit would _not allow time to procure, install, and test the CCSW flow control val~e component causing the degraded flow condition.
Yo~ provided as justification for*contin~ed operation that both Unit
- 3 CCSW loops were capable of meeting indiv.idual CCSW *pump TS surveillance requirements of 3500 gpm at a pressure of 180 psig.
Further, the measured and calculated flow of 6000 gpm for two ccsw pumps operating in parallel would provide adequate heat removal capability. Your bas.is for determining adequate heat removal was a December 1992 containment analysis that was reviewed by the NRC in March of 1993.
In addition, you identified compensatory measures to include: reading packages for Shift Engineers consisting of the full details of the existing condition; Unit 3 was to minimize. unnecessary maneuvers.. by the"Load Dispatcher, the station would not perform unnecessary maintenance work in the plant and the switchyard until both CCSW subsystems are declared operable; and Technical Specification surveillances will only be performed if the critical date is reached prior to declaring ccsw*operable.
Based on our review of your justification, including.the compensatory measures identified above, the st~ff has concluded that* this course of action involves minimal or no safety impact, and we ar~ clearly satisfied that this exercise of enforcement discretion is warranted from.a public health and safety perspective.
,';. ;~. :: ;": l _::
9410040106 940819 PDR ADOCK 05000249 p
I~.
Commonwealth Edison Company 2
AUG,_ ~ i993 Therefore, this letter documents our verbal granting on August 16, 1993, of our intention to exercise discretion not to enforce compliance with Technical Specification 3.5.B.4 for the period from August 16, 1993, at 8:31 a.m. (COT) until August 25, 1993, at 4:00 p.m. (COT).
Notwithstanding our granting of enfo~cement di~cretion, we will consider enforcement* action, as appropriate, for the conditions that led to the need for thi.s exercise of enforcement discretion.
cc:
M. Lyster, Site Vice President G. Spedl, Station Manager J. Shieldi, Regulatory Assurance Supervisor
- 0. Farrar, Nuclear Regulatory Services Manager OC/LFDCB Resident.Inspectors, Dresden LaSalle, Quad Cities, Clinton
.R. Hubbard J. Mccaffrey, Chief, Public Utilities Division R.
Newman~. Office of Public Counsel, State of Illinois Center Licensing Project ~anager, NRR State Liaison Officer Chairman, Illinois Commerce Commission J. B. Martin, RIII H. J. Miller, RIII T. 0. Martin, RIII J. E. Oyer, NRR E. J. Leeds, NRR M. L. Jordan, RII I C. 0. Pederson, RIII S. Stasek, SRI, Davis Besse J. G. Partlow, NRR W. T. Russell, NRR J. W. Roe, NRR J. A. Zwolinski, NRR J. Lieberman, OE Technical Assistant, Division of Reactor Projects - I/II, NRR.
Sincerely, Edward G. Greenman, Director Division of Reactor Projects