05000353/LER-2005-001, Re Core Alterations Performed with Source Range Monitor Alarm Horn Inoperable

Re Core Alterations Performed with Source Range Monitor Alarm Horn Inoperable

ML051260294
Person / Time
Site:	Limerick
Issue date:	05/06/2005
From:	Degregorio R Exelon Nuclear
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
LER 05-001-00
Download: ML051260294 (6)

LER-2005-001, Re Core Alterations Performed with Source Range Monitor Alarm Horn Inoperable

Event date:
Report date:
Reporting criterion:	10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications 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
3532005001R00 - NRC Website

text

10CFR50.73 May 6, 2005 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Limerick Generating Station, Unit 2 Facility Operating License No. NPF-85 NRC Docket No. 50-353

Subject:

LER 2-05-001, Unit 2 Core Alterations With Source Range Monitors Inoperable This Licensee Event Report (LER) addresses a Limerick Unit 2 condition prohibited by Technical Specifications in that core alterations were conducted while the Source Range Monitors (SRMs) were inoperable. The SRMs were inoperable due to a failure of the audible alarm function. SRM visual alarms, indications and rod block functions remained functional.

Report Number:

2-05-001 Revision:

00 Event Date:

March 12, 2005 Discovered Date:

March 12, 2005 Report Date:

May 6, 2005 This LER is being submitted pursuant to the requirements of 10CFR50.73(a)(2)(i)(B).

If you have any questions or require additional information, please do not hesitate to contact us.

Sincerely, Original signed by Ron J. DeGregorio Vice President - Limerick Exelon Generation Company, LLC cc: S. J. Collins, Administrator Region I, USNRC S. L. Hansell, USNRC Senior Resident Inspector, LGS

SUMMARY OF EXELON NUCLEAR COMMITMENTS LS-AA-117-1003 Rev.2 The following table identifies commitments made in this document. (Any other actions discussed in the submittal represent intended or planned actions. They are described to the NRC for the NRC's information and are not regulatory commitments.)

Commitment #1 Committed date (or "outage"): 12/1/05 An evaluation of Operations procedures will be performed to identify those affected by infrequently used refuel and outage related TS. Enhancements to the affected procedures will be implemented as required to ensure rule-based evaluations of TS impacts are performed.

NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION (6-2004)

LICENSEE EVENT REPORT (LER)

(See reverse for required number of digits/characters for each block)

APPROVED BY OMB: NO. 3150-0104 EXPIRES: 06/30/2007

, the NRC may not conduct or sponsor, and a person is not required to respond to, the information collection.

1. FACILITY NAME Limerick Generating Station, Unit 2

2. DOCKET NUMBER 05000353

3. PAGE 1 OF 4

4. TITLE Core Alterations Performed With Source Range Monitor Alarm Horn Inoperable

5. EVENT DATE

6. LER NUMBER

7. REPORT DATE

8. OTHER FACILITIES INVOLVED MONTH DAY YEAR YEAR SEQUENTIAL NUMBER REV NO.

MONTH DAY YEAR FACILITY NAME DOCKET NUMBER 05000 03 12 2005 2005 - 001 -

0 05 6

2005 FACILITY NAME DOCKET NUMBER 05000

9. OPERATING MODE 5

10. POWER LEVEL 0

11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR§: (Check all that apply) 20.2201(b) 20.2203(a)(3)(i) 50.73(a)(2)(i)(C) 50.73(a)(2)(vii) 20.2201(d) 20.2203(a)(3)(ii) 50.73(a)(2)(ii)(A) 50.73(a)(2)(viii)(A) 20.2203(a)(1) 20.2203(a)(4) 50.73(a)(2)(ii)(B) 50.73(a)(2)(viii)(B) 20.2203(a)(2)(i) 50.36(c)(1)(i)(A) 50.73(a)(2)(iii) 50.73(a)(2)(ix)(A) 20.2203(a)(2)(ii) 50.36(c)(1)(ii)(A) 50.73(a)(2)(iv)(A) 50.73(a)(2)(x) 20.2203(a)(2)(iii) 50.36(c)(2) 50.73(a)(2)(v)(A) 73.71(a)(4) 20.2203(a)(2)(iv) 50.46(a)(3)(ii) 50.73(a)(2)(v)(B) 73.71(a)(5) 20.2203(a)(2)(v) 50.73(a)(2)(i)(A) 50.73(a)(2)(v)(C)

OTHER 20.2203(a)(2)(vi) 50.73(a)(2)(i)(B) 50.73(a)(2)(v)(D)

Specify in Abstract below or in (If more space is required, use additional copies of (If more space is required, use additional copies of NRC Form 366A) (17)

Component data:

System:

IB (Annunciator System)

Component:

ANN (Annunciator)

Manufacturer:

170E (Edwards)

Model number:

5531-P1