ML20125D771

Informs of Change 17 to License DPR-11,cutting & Rerouting Main Steam Line & Feedwater Line,Isolating Feedwater Heater, Replacing Another Feedwater Heater W/Deaerating Heater & Installing New Feedwater Line

ML20125D771
Person / Time
Site:	05000130
Issue date:	12/17/1968
From:	Morris P US ATOMIC ENERGY COMMISSION (AEC)
To:	Mayer L 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 8506120465
Download: ML20125D771 (2)

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ATOMIC ENERGY COMMISSION WAeHINGTON. D.C. 30949 k '

l December 17, 1968 of g #I04

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Docket No. 50130 k )

Northern States Power Company '

Minneapolis, Minnesota 55401 Attention: Mr. L. O. Hayer I y l General superintendent of Power Change No. 18 '

Production License No. DPR-11 Gentlemen This refers to your letter dated November 1, 1968, submitting Amendment No. 46 to your application for the Pathfinder Atomic Power Plant. He amendment relates to changes to the facility for fossil-fueled operation of the turbine. The requested facility changes includes (1) cutting and rerouting of the main steam line and feedwater line, (2) isolation

, of a feedwater heater and replacement of another feedwater heater with '

t a deserating heater (3) installation of a new feedwater line from the new deserating heater to the existing feedwater pumps, (4) alteration of the fuel handling butiding heating system, (5) modification of the fuel handling building floor drain system,and (6) necessary temporary ,

, connections to perform decontamination of piping and equipment in the enf ating turbine cycle of the plant. We have designated your request as Proposed Change No. 18.

We understand that the following conditions will exist during the per-formance of the requested facility changes:

1. He reactor will contain no fuel and all fuel that is on site will .

remain stored in the fuel storage areas.

2. The containment isolation valves associated with the main steam line and feedwater line will remain closed.

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3. ne feedwater line will remain drained during the proposed pipe I i cutting operations and feedwater heater replacement and isolation.

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4. k ring and after modification of the fuel handling building floor drain system, the liquid waste handling system will remain in opera-tion as required by the Technical specifications. ,

S. getablished health physicii and personnel protection practices and procedures will be observed during all facility decontamination j . and modifications. - . .

6. All contaminated solutions or wastes resulting from decontamina-tion operations and proposed facility changes will be properly contained and disposed of in accordance with AgC regulations.

l on the basis of these considerations, we have determined that the proposed -

facility changes do not involve unreviewed safety questions.

The proposed change to the fuel handifng building heatias system would permit recirculation of air within the building rather than require a r 100 percent outside air supply as specified in technical specification 4.9.g(b). De heating steam conserved in this manner will be used to L heat the new boiler building. Se proposed change will not result in ,

significant hasards considerations not described or implicit in the '

safety analysis report as long as the above conditions entst, and there

( is reasonable assurance that the health and safety of the public will not be endangered. Accordingly, the last paragraph of section 4.9.g(b)*  ;

is hereby deleted from the Technical specifications (Appendix A) of i License No. DFA-11.  !

i he other proposed changes to the facility will not require any changes >

i to the Technical specifications as long as the reactor is not to be i operated. Herefore, these changes to the facility may be made without AgC authorisation se provided for by section 30.59(a) of 10 CFA S0.

sincerely, j

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pater A. Morris, Direstor

• Division of seactor Licensing ,

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