05000244/LER-2005-001, From R.E. Ginna Regarding Failure of ADFCS Power Supplies Results in Plant Trip
| ML051090253 | |
| Person / Time | |
|---|---|
| Site: | Ginna  (DPR-018) |
| Issue date: | 04/14/2005 |
| From: | Korsnick M Constellation Energy Group |
| To: | Skay D Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| LER 05-001-00 | |
| Download: ML051090253 (8) | |
| Event date: | |
|---|---|
| Report date: | |
| Reporting criterion: | 10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability 10 CFR 50.73(a)(2)(ii)(A), Seriously Degraded 10 CFR 50.73(a)(2)(viii)(A) 10 CFR 50.73(a)(2)(ii)(B), Unanalyzed Condition 10 CFR 50.73(a)(2)(viii)(B) 10 CFR 50.73(a)(2)(iii) 10 CFR 50.73(a)(2)(ix)(A) 10 CFR 50.73(a)(2)(iv)(A), System Actuation 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)(i)(A), Completion of TS Shutdown 10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications |
| 2442005001R00 - NRC Website | |
text
Maria Korsnick 1503 Lake Road Vice President Ontario, New York 14519-9364 585.771.3494 585.771.3943 Fax maria.korsnick~constellation.com Constellation Energy R.E. Ginna Nuclear Power Plant April 14, 2005 Ms. Donna M. Skay Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Attn:
Document Control Desk Washington, D.C. 20555-0001
Subject:
LER 2005-001, Failure of ADFCS Power Supplies Results in Plant Trip R.E. Ginna Nuclear Power Plant Docket No. 50-244
Dear Ms. Skay:
The attached Licensee Event Report (LER) 2005-001 is submitted in accordance with 10 CFR 50.73, Licensee Event Report System, item (a)(2)(iv)(A), which requires a report of "Any event or condition that resulted in manual or automatic actuation of any of the systems listed in paragraph (a)(2)(iv)(B) of this section".
This event has in no way affected the public's health and safety.
V ly your l/
aryG. K rsnick oO(YMO
xc:
Ms. Donna M. Skay (Mail Stop 0-8-C2)
Project Directorate I Division of Licensing Project Management Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission 11555 Rockville Pike Rockville, MD 20852 Regional Administrator, Region 1 U.S. Nuclear Regulatory Commission 475 Allendale Road King of Prussia, PA 19406 U.S. NRC Ginna Senior Resident Inspector
NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 06130/2007
, the NRC may digits/characters for each block) not conduct or sponsor, and a person Is not required to respond to. the
- 3. PAGE R. E. Ginna Nuclear Power Plant 05000 244 1 OF 6
- 4. TITLE Failure of ADFCS Power Supplies Results in Plant Trip
- 5. EVENT DATE
- 6. LER NUMBER
- 7. REPORT DATE
- 8. OTHER FACILITIES INVOLVED MONTH DAY YEAR YEAR SEQUENTIAL REV MONTH DAY YEAR FACILITY NAME l
05000 MONH AY YEA YAR NUMBER NO.
j FACILITY NAME DOCKET NUMBER 02 16 2005 2005 - 001 00 04 14 2005 05000
- 9. OPERATING MODE II.
THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR§: (Check all that apply)
O 20.2201(b) 0 20.2203(a)(3)(i) 0 50.73(a)(2)(i)(C) 0 50.73(a)(2)(vii) 10 20.2201(d) 0 20.2203(a)(3)(ii) 0 50.73(a)(2)(ii)(A)
E 50.73(a)(2)(viii)(A) 0 20.2203(a)(1) 0 20.2203(a)(4) 0 50.73(a)(2)(ii)(B) 0 50.73(a)(2)(viii)(B) 0 20.2203(a)(2)(i) 0 50.36(c)(1)(i)(A) a 50.73(a)(2)(iii) 0 50.73(a)(2)(ix)(A)
- 10. POWER LEVEL 0 20.2203(a)(2)(ii) 0 50.36(c)(1)(ii)(A) 0 50.73(a)(2)(iv)(A) 0 50.73(a)(2)(x) o 20.2203(a)(2)(iii) 0 50.36(c)(2) 0 50.73(a)(2)(v)(A) 0 73.71 (a)(4) o 20.2203(a)(2)(iv)
E 50.46(a)(3)(ii) a 50.73(a)(2)(v)(B) 0 73.71(a)(5) 100 C 20.2203(a)(2)(v) 0 50.73(a)(2)(i)(A) 0 50.73(a)(2)(v)(C) 0 OTHER o 20.2203(a)(2)(vi) 0 50.73(a)(2)(i)(B) 0 50.73(a)(2)(v)(D)
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B.
ACTION TAKEN OR PLANNED TO PREVENT RECURRENCE:
NOTE: There are no NRC regulatory commitments in this Licensee Event Report.
o Replace all ADFCS power supplies and fan arrays on a four refueling outage frequency.
o Routinely monitor power supply output voltage and ripple against design specifications.
o Purchase and/or refurbish spare power supplies.
o Replace remaining original vintage ADFCS power supplies.
o Evaluate the development of a new power supply design with a split chassis for better maintainability.
o Review other power supplies in plant equipment that may rely upon muffin fans for cooling and evaluate replacement per a preventative maintenance program.
VI.
ADDITIONAL INFORMATION
A.
FAILED COMPONENTS:
The failed ADFCS power supplies are nominally rated as 12V ( 70A. They were manufactured by ACDC Electronics Inc. and carry the "JF series" model designation. Model No. JF75 lB -
3000-0000.
B.
PREVIOUS LERs ON SIMILAR EVENTS:
A similar LER event historical search was conducted with the following results: No documentation of similar LER events with the same root cause at Ginna Station could be identified.