IR 05000309/1993003
| ML20036C313 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 06/09/1993 |
| From: | Linville J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| To: | Frizzle C Maine Yankee |
| References | |
| NUDOCS 9306160090 | |
| Download: ML20036C313 (3) | |
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Docket No. 50-309 l
Mr. Charles.
President l
Maine Yankee Atomic Power Company 83 Edison Drive
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Augusta, Maine 04336
Dear Mr. Frizzle:
I SUBIECT:
INSPECTION NO. 50-309/93-03
This letter refers to your May 13,1993 correspondence. in response to our April 15,'1993
letter.
Thank you for informing us of the corrective and preventive actions documented in your
.t letter regarding control of locked valves. These :u. c will be examined during a future inspection of your licensed program.
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Your cooperation with us is appreciated.
Sincerely,
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0;iinal Signed By*-
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t James c. linville i
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James C. Linville, Chief Projects Branch No. 3 Division of Reactor Projects
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I 9306160090 930609 OFFICIAL RE
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Mr. C. JUN - 919%
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G. Ixitch, Vice President, Operations P. L. Anderson, Project Manager (Yankee Atomic Electric Company) (w/cy of Licensee's
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Response Letter)
R. W. Blackmore, Plant Manager J. A. Ritsher, Attorney (Ropes and Gray) (w/cy of Licensee's Response Letter)
P. Dostie, State Nuclear Safety Inspector (w/cy of Licensee's Response Irtter)
Peter Brann, Assistant Attorney General (w/cy of Licensee's Response Ixtter)
U. Vanags, Maine State Planning Office (w/cy of Licensee's Response Ixtter)
C. Brinkman, Combustion Engineering, Inc. (w/cy of Licensee's Response Ixtter)
First Selectmen of Wiscasset (w/cy of Licensee's Response Ixtter)
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Maine State Planning Officer (w/cy of Licensee's Response Letter)
Public Document Room (PDR) (w/cy of Licensee's Response Ixtter)
Local Public Document Room (LPDR) (w/cy of Licensee's Response Letter)
Nuclear Safety Information Center (NSIC) (w/cy of Licensee's Response Ixtter)
K. Abraham, PAO (2 copies) (w/cy of Licensee's Response Letter)
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NRC Resident Inspector (w/cy of Licensee's Response Letter)
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State of Maine, SLO Designee (w/cy of Licensee's Response Letter)
c OFFICIAL RECORD COPY
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Mr. C. JUN - 91993 bec w/cy of Licensee's Response letter:
Region I Docket Room (with concurrences)
J. Linville, DRP W. Lazarus, DRP C. Marschall, SRI - Maine Yankee
H. Eichenholz, SRI - Vermont Yankee V. McCree, OEDO E. Trottier, LPM, NRR W. Butler, NRR
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6/8/93 OFFICIAL RECORD COPY A:REI9303.MEO
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MaineYankee m.
RELI ABLJ EL ECTRICITY SINCE 1972
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EDISON DR:VE * AUGUSTA, MAINE 04330 * (207) 622 4868 i
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May 13,1:,93 MN-93-53 JRH-93-102
UNITED STATES NUCLEAR REGULATORY COMMISSION
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Attention: Document Control Desk Washington, DC 20555
References:
(a) License No. DPR-35 (Docket No. 50-309)
(b) USNRC Letter to MYAPCo dated April 15, 1993, Resident Inspection 50-309/93-03
. Subject:
Inspection Report 93-03: Response to Notice of Violation - Valves in Their
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Required Positions Without the Required Locking Devices
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Gentlemen:
The attachment to this letter responds to the Notice of Violation contained in Reference (b). In the attachment to this letter, we have restated the violation and provided our response.
We have addressed our actions taken and those planned to
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prevent recurrence.
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Please contact us should you have any questions regarding this matter.
Very truly yours,
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James R. Hebert, Manager Licensing & Engineering Support Department JRH/ jag
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Attachment t
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'ME.lThomas1T. Martin c:
Mr. Charles S. Marschall
.i Mr. E. H. Trottier i
Mr. Patrick J. Dostie
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. Notice of Violation:
During an NRC inspection conducted on February 6 through March 22, 1993, one violation of NRC requirements was identified.
In accordance with the " General Statement of Policy and Procedure for NRC Enforcement Actions," 10 CFR Part 2, Appendix C, the violation is listed below:
Maine Yankee Yechnical Specifications, section 4.6 B, requires, in part, that all manual valves in the emergency and auxiliary feedwater systems necessary to assure emergency and auxiliary feedwater flow from the primary water source to the steam generators be locked in the proper position. Maine Yankee procedure 1-200-1, Administrative Control of Valves, Attachment 0, states, in part, that interface valves that would adversely impact on system performance if
incorrectly aligned shall be locked in their required position.
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Contrary to the above, on March 8, 1993, the NRC inspector identified five interface valves in the emergency and auxiliary feedwater systems, in the required position without the required locking devices.
This condition has existed since April 16, 1992, when the plant achieved initial criticality after the last refueling outage.
Maine Yankee Response:
On March 8,1993, while at full power, five manual valves which are interface valves that could adversely impact performance of the necessary emergency and auxiliary feedwater system did not have the administrative controls required by Maine Yankee Procedure 1-200-1, ADMINISTRATIVE CONTROL OF VALVES. These five valves were aligned and controlled by procedure, but were not locked as required.
The valves provide both alternate feedwater sources and discharge flow paths prior to power operations.
Prior to commencing operation at power, the valves are required to be aligned and locked in position to ensure that an emergency and auxiliary feedwater supply is available for reactor core energy removal.
Upon further evaluation by Maine Yankee, locking devices were immediately fitted to the affected valves.
A subsequent review of all the valves in the emergency and auxiliary feedwater flow path identified three additional valves which should have been locked but were not. These three valves were immediately fitted with locking devices and the procedure controlling the at-power position for all eight valves was revised to require verification that the valves are locked in their at-power i
position.
Review of the circumstances indicated that the root cause of this event was the misinterpretation of the policy governing locked valves as it pertained to the specific procedure controlling the periodic surveillance of these valves.
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Immediate Corrective Actions:
When the determination was made on March 8,1993, that the five valves required locking devices, the locking devices were immediately fitted to the five valves. A
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further review of the emergency and auxiliary feedwater system revealed three other i
valves required locking devices, which were also installed.
The procedure controlling the at-power position for the eight valves was revised.
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Corrective'Steos Taken to Avoid Further Violation:
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The Operation Department procedures are being reviewed to ensure that they conform to the policies governing locked valves.
In particular, the interface valves that
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would adversely impact on system performance if incorrectly aligned shall be locked.
in their required position.
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Full Como11ance-Date:
Full compliance was achieved on March 8,1993, when the five manual valves in the
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emergency and auxiliary feedwater system were fitted with locking devices.
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