ML20127J778

Documents Telcon W/A Ward of Util on 661005,during Which Author Suggested That Util Representatives at 661011-12 Meeting Prepare Oral Presentations Using Drl Special Interest as Guide

ML20127J778
Person / Time
Site:	Monticello
Issue date:	10/07/1966
From:	James Shea US ATOMIC ENERGY COMMISSION (AEC)
To:	US ATOMIC ENERGY COMMISSION (AEC)
References
NUDOCS 9211190421
Download: ML20127J778 (3)

Text

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UNITED STATES GOVERNMENT Memorandum To The Files DATE:

\ THRU: Roger S. Boyd, Chief Renserch & Power Renetor Safety Branch, DRL FROM  : J. Shea, Research is Power Reactor Sa fety Branch .h'"

Division of Reactor Licensing

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SUBJECT:

MONTICELLO, MINNESOTA - NORTHERN STATES POWER COMPANY NUCLEAR GENERATING PLANT - OCTOBER 11-12, 1966 MEETING AT BETHESDA 50443 I telephoned Mr. A. Ward of Northern States Power Company on October 5,1966 to indicate the areas of greatest staff interest and suggested that his ,

representatives at the October 11-12, 1966 Bethesda meeting prepare their '

orni presentations using the DRL staff nreas of special interest as a guide.

The stof f review will concentrate most of its effort on the following:

1. Renctor Vessel Field Febriention 1.1 Non destructive tests 1.1.1 Data and tests results comparing high_ energy Xray, a

gecre , and ultrasonic examinations.

1.1.2 Ascertain what new develonnental work must be accom-plished end where non destructive test techniques must be altered or improved.

1.2 Welding 1.2.1 Information relevant to process cnd controls.

1.3 Fabrication 1 1.3.1 Shell fit up 1.3.2 Sequence of operations '

1.3.3 Dimensional control 1.4 M$chinery 1.4.1 Dimensional date relative to functional requirements of intervals, and connection to other primary components.

1.4.2 -Final design and fabrication drawings.

2. Coolint Towers 2.1 Design criteria, description and functional details 2.0 Operating considerations for example release of liquid radioactive wastes -

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3. Integrity of Renetor Vessel and Interanis durine MCA nnd-

'Renetivity Excursions- _

3.1 Blowdown forces on individual vessel interFals -

3.2 Blowdown forc'es on nozzles fl nges,. etc.

3.3 Control rod Scram capability during blowdown '

3.4 Cold water-sprny-injection shock limits I

3.5 Reactivity insertion-energy release-reactor vessel movement-L or drege relationship Buy U.S. Savings Bonds Regularh on the Payoll Satings Plan 9211190421 661007 PDR- ADOCK-05000263:

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4. ,Enrincered Safetutrds 4.1 Design criteria 4.2 Design dets, assumptions nnd celculetionni methods 4.3 Periodic inspection and test requirements 4.4 Proof of design odequacy

5. Mnximum Credible Accident 5.1 Basis for the MCA 5.2 Evaluation of the MCA with cnd without pumps dependent core i

cooling water over the period of time required to bring the incident under control (i.e. fuel temperature reduction to approach at least saturated water temperature) . The following inform, tion should be plotted (f) time:

5.2.1 Reactor Vessel Pressure 5.2.2 Dry well Pressure 5.2.3 Torus Pressure (suppression chamber pressure) 5.2.4 Reactor Vessel water (or water-steam) temperoture 5.2.5 Maximum fuel temperature 5.2.6 Maximum clad temperature

, 5.2.7 Energy released from R.V 5.2.6 Rerctor Vessel water level 5.2.9 Renctor Power Level (decey hent) 5.2.10 Percent cled melted 5.2.11 Percent fuel melted 5.2.12 Percent clad-water recction 5.2.13 Metnl-wnter Renetton energy 9 5.2.14 Dry well water level 5.2.15 Pressure suppression chember weter tempercture 5.2.16 Core renetivity 5.2.17 Core sprty energy absorption (when considered) 5.2.15 Core sprcy flow rete La Significent event times should"identifidd:for exemple control rod scram, initintion of core spray, or operation of other engineered safeguards.

I noted that this was a complex request for information and not finally orscnir.ed yet, also that GE mcy not have enough time for more than a light treatment at the meeting.

6. Conteinment Isolntion

7. Mi ssile Protectio'n

8. Dif ferences between NSP and other B'4R Pirnts

9. Besis for the 15% turbine by-pnss 9.1 Plant scrcm susceptebility to power line disturbances

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. 3 OCT 7 8 Hr. Ward planned to cdvise G. E. of our interests inrnediately.

Distribution:

DRL Reading R&FASB Iter. ding cc: z. G. Case II . S . Boyd B. Grimes W. Jensen r.. Woodard J. She.,

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