05000277/LER-2005-001, Regarding Unit 2 Automatic Scram Due to Incorrect Assumptions When Aborting a Main Turbine Test

Regarding Unit 2 Automatic Scram Due to Incorrect Assumptions When Aborting a Main Turbine Test

ML052510436
Person / Time
Site:	Peach Bottom  (DPR-044)
Issue date:	09/02/2005
From:	Grimes J Exelon Nuclear
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
LER 05-001-00
Download: ML052510436 (5)

LER-2005-001, Regarding Unit 2 Automatic Scram Due to Incorrect Assumptions When Aborting a Main Turbine Test

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) 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
2772005001R00 - NRC Website

text

Exe lasn SM Exelon Nuclear Telephone 717.456.7014 NEuxe deIaT Peach Bottom Atomic Power Station wwwexeloncorp.com 1848 Lay Road Delta, PA 17314-9032 10CFR 50.73 September 2, 2005 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, DC 20555-0001 Peach Bottom Atomic Power Station (PBAPS) Unit 2 Facility Operating License No. DPR-44 NRC Docket No. 50-277

Subject:

Licensee Event Report (LER) 2-05-01 This LER reports an unplanned automatic scram of Unit 2 during the performance of routine main turbine testing. In accordance with NEI 99-04, the regulatory commitment contained in this correspondence is to restore compliance with the regulations. The specific methods that are planned to restore and maintain compliance are discussed in the LER. If you have any questions or require additional information, please do not hesitate to contact us.

Sincerely, Joseph P. Grimes Plant Manager Peach Bottom Atomic Power Station JPG/djf/CR 351609 Attachment cc:

PSE&G, Financial Controls and Co-owner Affairs R. R. Janati, Commonwealth of Pennsylvania INPO Records Center S. Collins, US NRC, Administrator, Region I R. I. McLean, State of Maryland US NRC, Senior Resident Inspector CCN 05-14074 R22T-

NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 06@30/2007 6-2ro4) the NRC maynot conduct digits/characters for each block) on a person Is not required to respond to, the Information

3. PAGE Nach Bottom Atomic Power Station 05000 277 1 OF 4

4. TITLE Unit 2 Automatic Scram due to Incorrect Assumptions when Aborting a Main Turbine Test

5. EVENT DATE

6. LER NUMBER

7. REPORT DATE

8. OTHER FACILITIES INVOLVED S N RFACILITY NAME DOCKET NUMBER MONTH DAY YEAR YEAR SEQUENTIAL REOV MONTH DAY YEAR 05000 FACILITY NAME DOCKET NUMBER 07 10 2005 05 0 09 2

2005 05000

9. OPERATING MODE 1l.THIS REPORTIS SUBMITTED PURSUANTTOrHE REQUIREMENTS OF 10 CFR§: (Check all that apply) o 20.2201(b)

E 20.2203(a)(3)(i) 0 50.73(a)(2)(i)(C) 0 50.73(a)(2)(vii) 0l 20.2201(d) 0 20.2203(a)(3)(ii) 0 50.73(a)(2)(fi)(A) 0 50.73(a)(2)(viii)(A) o 20.2203(a)(1) 0 20.2203(a)(4) 0 50.73(a)(2)(ii)(B) 0 50.73(a)(2)(viii)(B) 0l 20.2203(a)(2)(i) 0 50.36(c)(1)(i)(A) 0 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)

I 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) 0 50.46(a)(3)(ii) 0 50.73(a)(2)(v)(B) 0 73.71 (a)(5) 100 0 20.2203(a)(2)(v) 0 50.73(a)(2)(i)(A) 0 50.73(a)(2)(v)(C) 0 OTHER ol 20.2203(a)(2)(vi) 0 50.73(a)(2)(i)(B) 0 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)

Corrective Actions

The CRS has been remediated and reevaluated, additional corrective actions will be taken prior to resumption of full control room duties.

A standing order was issued to licensed operators communicating management expectations regarding human performance practices.

An assessment of Operations personnel concerning their knowledge of expected human performance behaviors will be performed.

A case study was developed covering the details of this event for use in continuing training.

The relay card and MTV switch were replaced by 7/11/05 and MTV indication was tested to ensure reliable operation.

Previous Similar Occurrences There were no previous LERs identified involving Main Turbine trips during testing.