ML19257B249

Responds to NRC 791109 & 27 Request for Confirmation That Fuel Rod Strainflow Blockage Models Are Conservative W/ Respect to NRC Model.Ge Models Used by Util Are of Conservative Level Equivalent to NRC Model

ML19257B249
Person / Time
Site:	Cooper
Issue date:	01/09/1980
From:	Pilant J NEBRASKA PUBLIC POWER DISTRICT
To:	Eisenhut D Office of Nuclear Reactor Regulation
References
NUDOCS 8001150410
Download: ML19257B249 (2)

Text

. . b LQA8000015 GENER AL OFFICE P. o. BOX 499, CoLUMOUS. NEBR ASK A 68601 Nebraska Publ.ic Power Distr.ic t mE~o~E = se. 8s.1 January 9,1980 Director, Nuclear Reactor Regulation Attn: Mr. D. G. Eisenhut, Acting Director Division of Operating Reactors U.S. Nuclear Regulatory Commission Washington, DC 20555

Subject:

Fuel Rod Strain-Flow Blockage Models Cooper Nuclear Station NRC Docket No. 50-298, DPR-46

Dear Mr. Eisenhut:

This letter is in response to your letters of November 9,1979 and November 27, 1979 requesting confirmation that the fuel rod strain-flow blockage models used on Cooper Nuclear Station are conservative with respect to the NRC's model derived from ORNL hulti-Rod Burst Test Facility data. Since Nebraska Public Power District does not technically have or use its own models in this area, the following discussion pertains to the use of General Electric Company approved models in association with the operation of Cooper Nuclear Station.

Via both your letters of November 9th and 27th and correspondence from GE, the District is aware of the review effort CE has applied to this issue. The District is also aware of the communications between GE and the NRC on this subject. Nebraska Public Power District herein affirms that based on correspondence from GE it is un 'erstood that over the operating range of interest pertinent to Cooper Nuclear Station the models applied by GE and approved by the NRC are of a con-servative level equivalent to the NRC model.

Sincerely, Jay c. Pilant Director of Licensing 1749 198 and Quality Assurance JDW/cmk ho 90 S

/!/

9001150 g/O

Mr. D. G. Eisenhut January 9, 1980 Page 2 STATE OF NEBRASKA )

) ss PLATTE COUNTY )

Jay M. Pilant, being first duly sworn, deposes and says that he is an authorized representative of the Nebraska Public Power District, a public corporation and political subdivision of the State of Nebraska; that he is duly authcrized to submit this information on behalf of Nebraska Public Power District; and that the statements in said appli-cation are true to the best of his knowledge and belief.

M Qay ti. Pilant Subscribed in my presence and sworn to before me this day of January, 1980.

d A-fl

/ NOTARY PUBLIC g/

My Commission expires / / O .

aman ustm.swed seeruu MARLYN R. HOHNDQlF

_ IIr Comm.Ess Oct.1 A 1980 1749 199