05000336/LER-2008-002, Regarding Unplanned LCO Entry - Three Charging Pumps Aligned for Injection with the Reactor Coolant System Temperature Less than 300 Degrees F
| ML081700280 | |
| Person / Time | |
|---|---|
| Site: | Millstone  |
| Issue date: | 06/11/2008 |
| From: | Price J Dominion Nuclear Connecticut |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 08-0269 LER 08-002-00 | |
| Download: ML081700280 (5) | |
| Event date: | |
|---|---|
| Report date: | |
| Reporting criterion: | 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications |
| 3362008002R00 - NRC Website | |
text
Dominion Dominion Nuclear Connecticut, Inc.
Millstone Power Station Rope Ferry Road, Waterford, CT 06385 JUN 11 2008 U.S. Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555 Serial No.
MPS Lic/GJC Docket No.
License No.
08-0269 RO 50-336 DPR-65 DOMINION NUCLEAR CONNECTICUT. INC.
MILLSTONE POWER STATION UNIT 2 LICENSEE EVENT REPORT 2008-002-001 UNPLANNED LCO ENTRY - THREE CHARGING PUMPS ALIGNED FOR INJECTION WITH THE REACTOR COOLANT SYSTEM TEMPERATURE LESS THAN 300 DEGREES F.
This letter forwards Licensee Event Report (LER) 2008-002-00 which documents a condition identified at Millstone Power Station Unit 2 on April 13, 2008. This LER is being submitted pursuant to 50.73(a)(2)(i)(B), as an operation or condition prohibited by Technical Specifications.
If you have any questions or require additional information, please contact Mr. William D. Bartron at (860) 444-4301.
Very truly yours, J Al rnPrice rteice President -Millstone
Serial No. 08-0269 Licensee Event Report 2008-002-00 Page 2 of 2 Attachments:
1 Commitments made in this letter: None.
cc:
U.S. Nuclear Regulatory Commission Region 1 475 Allendale Road King of Prussia, PA 19406-1415 Ms. C. J. Sanders Project Manager U.S. Nuclear Regulatory Commission One White Flint North 11555 Rockville Pike Mail Stop 08B3 Rockville, MID 20852-2738 NRC Senior Resident Inspector Millstone Power Station
Abstract
On April 13, 2008 at 0805 with the plant shut down in MODE 6, while performing control room operator rounds, a Licensed Operator identified three charging pumps were aligned so they were capable of injection with the Reactor Coolant System temperature less than 300 degrees F. The plant was in this configuration for approximately six hours. Upon discovery of this condition, Technical Specification Action Statement 3.1.1.3.b was immediately entered and then exited when the swing charging pump was made incapable of injection into the Reactor Coolant System.
The cause of this event was determined to be inadequate configuration control because the tag for the charging pump removed from service to comply with the Boron Dilution TS 3.1.1.3.b. did not provide adequate guidance.
Subsequent reconfiguration of the charging system to support electrical work activities aligned three charging pumps so they were capable of injection with the Reactor Coolant System temperature less than 300 degrees F.
Since the plant was in a configuration prohibited by the Technical Specifications, this event is reportable in accordance with 10CFR50.73(a)(2)(i)(B) as any operation or condition prohibited by the plant's Technical Specifications.
NRC FORM 366 (9-2007)
(If more space is required, use additional copies of (If more space is required, use additional copies of NRC Form 366A) (17) concentration from 2240 ppm to the point the reactor becomes critical would be considerably longer than 30 minutes, and bounded by the existing FSAR Chapter 14 boron dilution analyses.
- 4.
Corrective Action
Upon discovery of the condition where three charging pumps were aligned so they were capable of injection with the RCS temperature less than 300 degrees F, TS Action Statement 3.1.1.3.b was immediately entered and then exited when the swing charging pump was made incapable of injection into the RCS. The plant was in the prohibited configuration for approximately six hours.
Additional corrective actions to address this event will be evaluated in accordance with the station's Corrective Action Program.
5. Previous Occurrences
No previous similar events/conditions were identified.
Energy Industry Identification System (EIIS) codes are identified in the text as [XX].