ML20247D079

Application for Amends to Licenses DPR-39 & DPR-48,removing Section 3/4.17.2, Aircraft Fire Detection Sys, from Tech Specs Due to Low Probability of Aircraft Crash

ML20247D079
Person / Time
Site:	Zion  File:ZionSolutions icon.png
Issue date:	07/18/1989
From:	Trzyna G COMMONWEALTH EDISON CO.
To:	Office of Nuclear Reactor Regulation
Shared Package
ML20247D080	List: ML20247D079 ML20247D084 ML20247D089
References
NUDOCS 8907250035
Download: ML20247D079 (2)

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Commonwealth Edison

. 72 West Adams Street. ChCago, liknois AddiesslepFy tEPost Offse Bos 76F Chicago, libnois 60690 - 0767 July 18, 1989 Director of Nuclear Reactor Regulation US Nuclear Regulatory Commission s Mail Station Pl-137 Washington, DC 20555

Subject:

Zion Nuclear Power Station, Units 1 and 2 License Nos. DPR-39 and DPR-48 Proposed Amendment to Technical Specification Section 3.17.2, " Aircraft Fire Detection System" h

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Reference:

July 11, 1989, telephone conversation between NRR/ CECO personnel regarding DCRDR Gentlemen:

Attachment 1 to this letter outlines a proposed amendment to facility Operating License Numbers DPR-39 and DPR-48 Technical Specifications, Appendix A. The proposed amendment requests the removal of Section 3/4.17.2, " Aircraft Fire Detection System" from the Technical Specifications.

The justification for the request for the removal of the Aircraft Fire Detection System is premised on a comparison of the existing and projected operations at Waukegan Regional Airport to the guidance that exists in the Standard Review Plan, Section 3.5.1.6 " Aircraft Hazards" (Rev. 2-July 1981). This evaluation was performed by the Fluor Daniel Corporation and the study concluded that the probabilities of aircraft crash are sufficiently low enough to warrant removal of Aircraft Fire Detection System at Zion Station. Attachment 2 to this letter contains one copy of the report entitled, " Aircraft Crash Fire Detection-System Analysis Probabilities Risk Evaluation".

Attachment 3 to this letter contains a No Significant Hazards Review and provides a demonstration that the proposed change warrants no significant hazards consideration.

Zion Station is presently implementing the final modifications, procedure revibions etc. to address the Human Engineering Deficiencies (HED) that resulted from the Detailed Control Room Design Review (DCRDR). HED 0279 identified seven Control Room annunciators which routinely produce false alarms. The aircraft fire detection annunciator was included in this population. Corrective action has been taken to address six of the annunciators. Approval of this proposed Technical Specification amendment would allow the Station to initiate at a minimum, a Temporary Alteration (T/A) to defeat the input to this annunciator and close out the HED. This T/A would be initiated within 3 to 4 weeks after receipt of the approved Technical Specification amendment.

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, . Dir. of Nuclocr R :;ctor R;9 July 18, 1989 l

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As provided by 10 CFR 50.91, the State of Illinois is being notified of this snendment request by transmittal of this letter and attachments.

Please direct any questions that you may have regarding this matter to this office.

Very truly yours,

/

Kfc 4 G.E. Trzyna Nuclear Licensing Administrator l

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/sc1:0207T:1-2 cc: C.P. Patel-NRR W/ report M.C. Parker-IDNS W/o report Resident Inspector-Zion W/o report

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