ML20154S693

Application for Amend to License NPF-43,amending Tech Spec 3.6.1.7, Containment Sys - Drywell Average Air Temp, Clarifying That Thermocouple Locations Defined in Spec Are for Ref Only.Fee Paid

ML20154S693
Person / Time
Site:	Fermi
Issue date:	04/03/1986
From:	Agosti F DETROIT EDISON CO.
To:	Adensam E Office of Nuclear Reactor Regulation
Shared Package
ML20154S696	List: ML20154S693 ML20154S707
References
VP-86-0021, VP-86-21, NUDOCS 8604080058
Download: ML20154S693 (4)

Text

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April 3, 1986 VP-86-0021 t

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e Director of Nuclear Reactor Regulation I Ms. Elinor G. Adensam, Director l Project Directorate No. 3 ,

Div'ision of.BWR Licensing  :

U. 5. Nuclear _ Regulatory Commission l Washington, D. C. 20555  ;

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Dear Ms. Adensam:

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. Reference Fermi 2 [

NRC Docket No. 50-341 NRC License No. NPF-43

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Subject:

Request for Amendment to Fermi 2 L Technical Soncification 3.6.1.7 ,

I In accordance with 10CFR50.91 'and 10CFR50.92, Detroit

! Edison hereby requests an amendment to ' Fermi 2 Technical

! Specification 3.6.1.7, " Containment Systems - Drywell '

-Average Air Temperature". .,

1-l This specification requires that the drywell average air  !

t temperature not exceed 135 degrees Fahrenheit. 'ihe i

! average drywell air temperature is defined via- the i i

volumetric average of ' temperatures measured in each of ,

the six zones identified in Technical Specification  ;

! 3/4.6.1.7. The subject Technical Specification clearly t

! delineates the vertical and azimuthal locations of the l hemperature sensors to ensure that at least one ,

l tempGrature value from each of the six zones (i.e.,

elevations) is used in calculating the desired  ;

(volumetric) average drywell air temperature.  ;

i t A review of Fermi 2 as-built documer.tation has indicated i that the temperature sensor location information in the  ;

l Technical Specification does not reflect exact agreement

! with the as-built data. The as-built locations are r

within a few inches of the Technical Specification .

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values. Since the location information in the Technical i

) Specification is provided for zone identification only, j B404000058 860403 \

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Ms. Elinor G. Adensam April 3, 1986 VP-86-0021 Page 2 Detroit Edison considers tha current information in the Technical Specifjcations to be acceptable approximations of the actual location data. Edison requests that Technical Specification 3/4.6.1.7 be revised as shown in the enclosure. This revision will add a note clarifying that the thermocouple locations deff ned in the specification are for reference only. This tevision does not alter the requirement to determine the volumetric average temperature using at least one temperature reading from each zone.

Significant Hazards Analysig Detroit Edison has evaluated the proposed change for significant hazards considerations in accordance with 10CFR50.92. Detroit Edison has determined that adding the clarification to Technical Specification 4.6.1.7 would not increase the probability or consequences of an accident evaluated in our FSAR. Instead, addition of this clarification would be expected to reduce the probability of untirely forced shutdown of the plant, and the attendant risk of plant transients.

Addition of this note would not create the poscibility of a new or different kind of accident from any previously analyzed. The proposed change is administrative in nature.

Addition of the clarification would not involve a significant reduction in a margin of safety. The volumetric average temperature will be determined as before. However, the risk of untimely plant shutdown would be reduced by this clarification, increasing the margin of safety at Fermi 2.

Detroit Edison concludes that addition of this clarification to Technical Specification 3.6.1.7 involves no significant hazards considerations. This conclusion is consistent eith example (1) of an amendment considered not likely to involve significant hazards considerations, shown in 48FR14870 (a purely administrative change to Technical Specification) .

Detroit Edison has evaluated this request in cccordance with the criteria in 10CFR170.21 and has enclosed an application fee of one hundred fifty dollars ($150.00) as initial payment for this application for amendment under Facility Category A (Power Reactors).

. 's Ms. Elinor G. Adensam April 3, 1986 VP-86-0021 Page 3 In accordance with 10CFR50.91, the State of Michigan has been provided a copy of this letter.

Should you have any questions in this matter, please contact Mr. R. L. Woolley (313) 586-4211.

Sincerely,

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cc: Mr. M. D. Lynch Resident Inspector 's Of fice Supervisor, Advance Planning and Review Sectiora Michigan Public Service Commission USNRC Document Control Desk Washington, D.C. 20555 i

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• M2. E. G. Ad;nCOO April 3, 1986 VP-86-0021 Page 4 I, FRANK E. AGOSTI, do hereby af firm that the foregoing statements are based on facts and circumstances which are true and accurate to the best of my knowledge and belief.

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y VRANK E. AGOSTI Vice President Nuclear Operations On this day of , 1986, before me personally appeared Frank E. Agosfi, being first duly sworn and says that he executed the foregoing as his free act and deed.

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