ML20125D241

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Forwards Amend 1,Change 2 to License DPR-11,authorizing Receipt,Possession & Use of 224 G Pu Encapsulated as Two 1-Ci & Two 6-Ci Pu/Be Neutron Sources
ML20125D241
Person / Time
Site: 05000130
Issue date: 07/24/1964
From: Doan R
US ATOMIC ENERGY COMMISSION (AEC)
To: Hill H
NORTHERN STATES POWER CO.
Shared Package
ML20125A538 List:
References
FOIA-85-54 NUDOCS 8506120289
Download: ML20125D241 (2)
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UNITED STATES tiCENSE AUTHORIT( FILE COPY l

ATOMIC ENERGY COMMISSION C*

"' " " " JUL 241964 h j/[

Docket No. 50-130 JM V

Northern States Power Company ' Change No. 2 gned 1 15 South Fifth Street -

Minneapolis 2, Minnesota '

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Attention: Mr. Hibbert Hill

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Vice President - Engineering

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Gentlemen:

Transmitted herewith is Amendment No. I to Provisional Operating License No. DPR-11. The amendment, in accordance 'with the applica- l tion dated July 13, 1964, authorizes receipt, possession and use of 224 grams of plutunium encapsulated as two 1-curie and two 6-curie l plutonium-beryllium neutron sources. l Also enclosed is a copy of a Notice of Issuance of Facility License (i Amendment which has been submitted to the Office of the Federal Register for publication, and a copy of the related Hazards Analysis.

In order to enable you to operate the Pathfinder reactor with two 6-curie plutonium-beryllium sources, Change No. 2 to the Technical Specifications of Provisional Operating License No. DPR-11 is

hereby authorized. ,

On the basis of the information submitted in support thereof, we have concluded that Change No. 2 does not present significant hazards considerations not described or implicit in the hazards summary report, and that there is reasonable assurance that the health and safety of the public will not be endangered.

In view of the foregoing, Section 5.5.1, Section 5.7.1(a), the third '

paragraph of Section 7.4.'1 and the second paragraph of Section 7.4.2 of the Technical Specifications are hereby changed to read as follows:  ;

i 5.5.1 Initial Start-up Source, 4 During initial fuel loading and low-pressure testing, ,

not more than two 6. curie plutonium-beryllium neutron {

sources shall be used. Tacse sources shall be posi-tioned in superheater process tubes. At all times l 85061g09 B50214 3-PDR 85-54

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JUL 24 EE4 I

during the use of these sourcesg0 the maximum thermal flux shall be limited to 5 x 10 nv at the position l of the sources.

5.7.1(a) Refueling Partial core tests may be run, but the reactor power shall be limited to 1.0 Mwt, exclusive of core decay heat. When using the plutonium-beryllium sources, the power shall be limited as described in 5.5.1.

7.4.1 Basic Test Conditions Not more than two 6-curie Pu-Be neutron ' sources shall be provided to yield meaningful readings on neutron sensitive chambers. The neutron population shall be monitored during the loading.

7.4.2 Boiler Slab Core Loading and Criticality With the core drained, the boiler boxes and control rods shall be loaded'into the vessel. Nuclear instru-mentation for information and protection shall be operable in accordance with 7.4.1. Not more than two

( 6-curie Pu-Be neutron sources shall be located in the 5.uperheater process tubes. The boiler fuel elements shall be loaded into the dry core to form a slab array.

The neutron population shall be. monitored. during the loading.

Sincerely yours, 06ginl50*d8I R.L D en R. L. Doan, Director Division of Reactor Licensing

Enclosures:

(3)

1. Federal Register Notice
2. Amendment No. I to License DPR-11
3. AEC llazards Analysis l'

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