05000423/LER-2006-001, Re Loss of Safety Function of the Control Room Emergency Ventilation System

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Re Loss of Safety Function of the Control Room Emergency Ventilation System
ML061640341
Person / Time
Site: Millstone Dominion icon.png
Issue date: 06/02/2006
From: Price J
Dominion Nuclear Connecticut
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
06-414 LER 06-001-00
Download: ML061640341 (6)


LER-2006-001, Re Loss of Safety Function of the Control Room Emergency Ventilation System
Event date:
Report date:
Reporting criterion: 10 CFR 50.73(a)(2)

10 CFR 50.73(a)(2)(x)

10 CFR 50.73(a)(2)(v)(A), Loss of Safety Function - Shutdown the Reactor

10 CFR 50.73(a)(2)(v)(B), Loss of Safety Function - Remove Residual Heat

10 CFR 50.73(a)(2)(1)

10 CFR 50.73(a)(2)(v), Loss of Safety Function
4232006001R00 - NRC Website

text

'7 Dominion-Dominion Nuclear Connecticut, Inc.

Millstone Power Station Rope Ferry Road Waterford, CT 06385 JAN 2 W6 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555 DOMINION NUCLEAR CONNECTICUT. INC.

MILLSTONE POWER STATION UNIT 3 LOSS OF SAFETY FUNCTION OF THE VENTILATION SYSTEM Serial No.06-414 MPS Lic/WDB RO Docket No.

50-423 License No.

NPF-49 CONTROL ROOM EMERGENCY This letter forwards Licensee Event Report (LER) 2006-001-00, documenting an event that occurred at Millstone Power Station Unit 3 on April 4, 2006. This LER is being submitted pursuant to 10 CFR 50 73(a)(2)(v)(D) as an event or condition that could have prevented fulfillment of a safety function of structures or systems needed to mitigate the consequences of an accident.

If you have any questions or require additional information, please contact Mr. David W.

Dodson at (860) 447-1791, extension 2346.

Very truly yours, aPrice iteiclePreesident - Millstone

Serial No.06-414 LER 2006-001 -00 Attachments:

LE R 2006-001 -00Pae2o2 Commitments made in this letter: None cc:

U.S. Nuclear Regulatory Commission Region I Regional Administrator 475 Allendale Road King of Prussia, PA 19406-1415 Mr. V. Nerses NRC Senior Project Manager Millstone Units 2 and 3 U.S. Nuclear Regulatory Commission, Mail Stop 8 C2 One White Flint North 11555 Rockville Pike Rockville, MD 20852-2738 Mr. S. M. Schneider NRC Senior Resident Inspector Millstone Power Station Millstone Power Station Unit 3 LER 2006-001 -00 Millstone Power Station Unit 3 Dominion Nuclear Connecticut, Inc. (DNC)

NRIC FORM 366 U.S. NUCLEAR REGULATORY APPROVED BY 0MB NO. 3150-0104 EXPIRES 06=102007 (6-2004)

COMMISSION

, the NRIC may not (Seerevese or rquied nmberof igittchractrs fr echductk or aponsor. end a person Is not required to respond to, the Information collection.

j 3. PAGE Millstone Power Station - Unit 3 05000423 1 0F3

4. TITLE Loss Of Safety Function Of The Control Room Emergency VentilationSystem___________
5. EVENT DATE
6. LER NUMBER
7. REPORT DATE
8. OTHER FACILITIES INVOLVED MO DAY YEAR YEAR SEQUENTIAL REV NME N 0 MO DAY YEAR 05000 T I FACILITY NAME DOCKET NUMBER 04 04 2006 2006 - 001 - 00 06 02 2006 05000
9. OEAIGMODE 1
11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENMTS OF 10 CFR 1: (Check affthat apply)

____________1_20.2201(b) 20.2203(a)(3)(1i) 50.73(a)(2)(II)(B) 50.73(a)(2)(Ix)(A)

10. POWER LEVEL 100 120.2201 (d)

__20.2203(a)(4)

__50.73(a)(2)(111)

- 50.73(a)(2)(x) 120.2203(a)(1)

__50.36(C)(1)(i)(A)

__50.73(a)(2)(11v)(A) 73.71 (a)(4) 120.2203(a)(2)(1)

__50.36(c)(1)(11)(A)

__50.73(a)(2)(v)(A)

_73.71 (a)(5)

~~2 20.2203(a)(2)(11)

._50.36(c)(2)

__50.73(a)(2)(v)(B)

OTHER 20.2203(a)(2)(1i1)

__50.46(a)(3)(11) 5_

,0.73(a)(2)(v)(C)

Specify In Abstract below or 20.22D3(a)(2X(Iv) 50.73(a)(2)(1)(A) x 50.73(a)(2)(v)(D)

In NRIC (if more space Is required, use additional copies of NRC Form 366A) (17)

4. Corrective Action

A supplement to this Licensee Event Report will be submitted by August 31, 2006.

5. Previous Occurrences

No previous similar events/conditions were identified.

Energy Industry Identification System (El IS) codes are identified in the text as [XX].