ML20125D418

Informs of Change 5 to License DPR-11,increasing Max Reactivity Addition Rate During R&D Testing Program

ML20125D418
Person / Time
Site:	05000130
Issue date:	05/27/1965
From:	Doan R US ATOMIC ENERGY COMMISSION (AEC)
To:	Hill H NORTHERN STATES POWER CO.
Shared Package
ML20125A538	List: ML20125D123 ML20125D151 ML20125D175 ML20125D208 ML20125D224 ML20125D241 ML20125D271 ML20125D310 ML20125D324 ML20125D333 ML20125D352 ML20125D364 ML20125D385 ML20125D404 ML20125D418 ML20125D526 ML20125D534 ML20125D541 ML20125D545 ML20125D551 ML20125D554 ML20125D559 ML20125D561 ML20125D563 ML20125D567 ML20125D571 ML20125D582 ML20125D587 ML20125D595 ML20125D618 ML20125D671 ML20125D691 ML20125D706 ML20125D718 ML20125D736 ML20125D760 ML20125D771 ML20125D787 ML20125D800
References
FOIA-85-54 NUDOCS 8506120350
Download: ML20125D418 (1)

Text

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UNITED STATES g . i 3 ' ' .'  %

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MAY 2 71965 o m n m vnaren m Docket No. 50-130 g

p t" Northern States Fouer Company Change No. 5 15 South Fifth Street Minneapolis 2, Minnesota /

Attention: Mr. Nibbert Hill / p Vice President- Engineering _ p Gentlemen: jf/#

By application dated May 24, 1965, the Northern states Feuer Company requested authorisation of a change in Technical specifications to License No. DPR-11. This request would allow the maximum reactivity insertion rate to be increased for research and development testing of the reactor. This change was requested because testing has indicated that certain control rod configurations could result in reactivity insertions in excess of those presently authorised.

On the basis of our review of the information submitted we have concluded

( that Change No. 5 does not present significant hasards considerations not described or implicit in the hasards summary report and that there le

• reasonable assurance that the health and safety of the public will not be endangered. A related Safety Evaluation is attached.

Accordingly, the third paragraph of section 3.0 of the Technical Specifica-tions is hereby changed to read as follows:

"During the experiments with the slab array, the maximum possible reactivity addition rate shall be no greater than 40 cents per second.

During Phase I and Phase 11 emperiments (other than slab array), the manimum reactivity insertion rate may be as high as 25 cents per second provided that either channel 5 or 6, by itself, is capable of serasseing the reactor."

Sincerely yours, Originals!gnedbg

n. L. Doan R. L. Doan, Director Division of Reactor Licensing Enclosuret safety Evaluation i

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PAY 85-54 PDM

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