ML20202H172

Partially Deleted Ltr Re Concerns Raised to NRC Concerning PP&L Susquehanna Facilities.Concerns on Validity of Computer Data Used at Facility

ML20202H172
Person / Time
Site:	Susquehanna
Issue date:	11/25/1997
From:	Vito D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
To:	AFFILIATION NOT ASSIGNED
Shared Package
ML20202F480	List: ML20202F476 ML20202F550 ML20202F581 ML20202F610 ML20202F634 ML20202F668 ML20202F675 ML20202F692 ML20202F719 ML20202G410 ML20202G487 ML20202G501 ML20202G517 ML20202G590 ML20202G608 ML20202G629 ML20202G641 ML20202G673 ML20202G695 ML20202G712 ML20202G743 ML20202G796 ML20202G801 ML20202G809 ML20202G829 ML20202G857 ML20202G873 ML20202G894 ML20202G914 ML20202H061 ML20202H067 ML20202H073 ML20202H078 ML20202H133 ML20202H162 ML20202H172 ML20202H180 ML20202H194 ML20202H200 ML20202H245 ML20202H262 ML20202H305 ML20202H341 ML20202H365 PLA-4851, Provides Info That Was Requested by Cj Anderson on 980213 Re Former Util Employee Concern on Radwaste Control Room Offgas Panel Alarm Testing PLA-4852, Forwards non-redacted Version of Pp&L,Inc Corporate Auditing Rept 739459-2-98,dated 980210.Informs That Document Contains Info to Be Withheld IAW 10CFR2.790 PLA-4854, Provides Summary of Investigations That PP&L Performed in Response to Concerns Identified by Former Nuclear Plant Operator.Summary Requested by Cj Anderson on 980213 PLA-4865, Forwards Listed non-redacted Pp&L,Inc Corporate Auditing Repts.Informs That Document Contains Info to Be Withheld IAW 10CFR2.790
References
FOIA-99-36 NUDOCS 9902080028
Download: ML20202H172 (3)

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1. %, UNITED STATES f g NUCLEAR REGULATORY COMMISSION 3

E REGloN I l I 475 ALLENDALE RoAo l

,oE KING oF PRuSstA. PENNSYLVANIA 19406-1415

• • • • • November 25, 1997 I

RI-97-A-OO49 j

Subject:

CONCERNS YOU RAISED TO THE NRC REG ARDING PENNSYLVANIA j POWER AND LIGHT COMPANY'S SUSQUEHANNA FACILITIES 1 This letter updates my September 23,1997, letter to you regarding your last concern on the validity of computer data used at the Susquehanna Steam Electric Station. l l

You were concerned about the quality of computer data used to determine the adequacy of. -

nuclear plant operator per4ormance and specifically, the significance of a February 1997 l occurrence where an emergency diesel generator alarm test (OC577E) apparently did not result in a computer data entry. We have completed our review of th.is concern, and determined that there was a computer entry for the specific test cited, and further, that none of the known computer data discrepancies'has detracted from the validity of the data used to evaluate NPO performance.

Following a February 13,1997, alarm panel test failure, a condition report and work authorizations were processed to determine why the control room did not get an alarm reflash. At the time that the alarm panel test was performed, a separate plant testing activity was being performed. The presence of alarms associated with the second test caused the control room alarms that would have indicated OC577E alarm panel test to be in the alarmed condition on February 13,1997, prior to the performance of the alarm panel test. As a result, the alarm panel test should have caused a reflash in the control room.

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The reflash condition did not occur because of a failed reflash component. Computer points EGZ12 & 14 are normally actuated by the OC577E alarm test. The functioning of the Unit 1 and 2 EGZ14 computer points was also affected by the interaction between the two tests and the reflash component failure. The Unit 2 computer point EGZ? 2 was inoperable on February 13, but the Unit 1 computer point EGZ12 was operable throughout the February 13,1997 test and accurately recorded the performance of the test. There was no evidence to indicate that this condition was other than an random low probability occurrence. The licensee's corrective actions and root cause determination associated with the condition report were adequate.

CERTIFIED M All RETURN RECEIPT REQUESTED 9902080028 990129 1 f p

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2 RI-97-A-OO49 A sample of test and maintenance data was reviewed to determine if there were sirn..er or repeated failures of control room reflash relays. No evidence of repeated similar failures could be identified in addition, these findings and two other potential discrepa,ncies involving radiological waste control room alarms and ESS transformer alarms were assessed to determine whether these issues collectively discredited the OC577E alarm test data. No common initiating or contributing conditions in either of the other reviews were identified that corresponded to the root cause of the failed February 13,1997 test; or that could affect the OC577E data. Therefore, we have concluded that none of the identified concerns affected the validity of the OC577E alarm computer data.

Thank you for informing us of your concerns. We feel that our actions in this matter have been responsive to those concerns. If you have any further questions or comments on this matter, please call me via the NRC Safety Hotline at 1-800-695-7403.

Sincerely,

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David J. ito Senior Allegation Coordinator

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raerHows coNvensATioN RECoHD Datr Octobsr 3,1997 rrn : 4:50 p.m.

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• =* Docket No.:

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Person Calling: Sharon Johnson  % *:

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Person Called: 9 Subject Telephone Calls to Nelson and Swetland on 10/3/97 l Summary: MISSED ALARM TESTS Individual made calls to Nelson and Swetland based on receipt of NRC letter (for RI-97-A-0214) which does not address his issues raised under RI-97-A-0145.

Johnson called the individual this date to clarify his concems. Johnson left message on answering machine for individual to call 1-800495-7403.

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Action Requiredfraken:

Place in file. Await individual toAtall bapk. f Signature: ,} Date: October 3,1997

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