ML20128C472

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Summary of 690401 & 02 Meeting W/Nsp,Ge & Bechtel to Clarify Review Items of Concern & Determine What Areas Will Require Addl Info from Applicant.List of Attendees Encl
ML20128C472
Person / Time
Site: Monticello Xcel Energy icon.png
Issue date: 05/06/1969
From: Hale C
US ATOMIC ENERGY COMMISSION (AEC)
To: Boyd R
US ATOMIC ENERGY COMMISSION (AEC)
References
NUDOCS 9212040436
Download: ML20128C472 (5)


Text

y R. S. boyd, Assistant Director for Reactor Projects. EL THRU D. R. Muller, Chief, Reactor Project Branch #1 St'tMARY OF MRETING WIT 11 NORTHERN STATES POWER COMPANY, MONTICELLO MUCLKAR CENERATING FLANT, DOCKET NO.@

The second technical meeting with Northern States Power Company (NSP) and their contractors General Electric and Bechtel, was held on April 1 and 2, 1969. An attendance list is attached.

The larger part of the two day meeting was devoted to clarifying reviets itens of concern, and to determining what areas will require additional inforvention f rom the applicant. The applicant has not submitted to date any requestod information, errata, or data tr.issing in the FSAR.

The following in a summary of the more salient iteen discussed at the s>eetingt

1. $41amic and Structural Denirn
  • The applicant was advised that the information contained in the TSAR was insuf ficient in these areas of desirn to such an extent that a meaningful evaluation could not be made.

In sor.e instances the PSAR contained more comprehensive inforn.a-tion than the TSAR but the degree of inplementation in the final design io questionabic. The applicant is being asked to subr.it more complete inf ormation in these areas of desirn for evaluation by the staff and our consultants.

2. Split-Bus Design i A split-bus design is used to isolate indepeadent electrical I supply sources. Should two such systems become inadvertantly l linked both systems could be defeated. The TSAR states the j Monticello diesel-generator sets are of split-bus design, but our investigation has revealed an automatic switching link between tho sets. CE stated this link is necessary to provide redundant power to the valve operstors in the LPCI logic.

According to CE this automatic tie is not, unique to the ,

Monticello Unit.

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9212040436 690506 PDR ADOCK 05000263 l A PDR

-r-w i R. S. Boyd  !

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3. Jyttrumentation and Control I Regarding the safety significance of the Rod Block Monitor and

. the need for a flow-following-power trip system, og is tanting l the same position on Monticello as on other current projects:

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! (a) The kBH is not a safety system in all its functions thus IEEE-279 is not applicable to the complete syste's.

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(b) A flow-biased trip setting on power is not a requirement for the BWR design. ,

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4. _ Containment 1.eakage Testir.g l CE will follow the same procedures for leak testing the reactor building that were employed on the recent Oyster Creek contain-ment. However, the Oyster Creek data will be assessed to determine the causative factors leading to the inability of l the Oyster Creek test to meet Tecimical Specification require- ,

ments.

5. HPCI Isolation Valve A break inboard of the outer isolation valve in the HPCI vould

' result in an uncontrolled blowdown if~the inner isolstion valve failed to close. This possibility has resulted in imi power sources being supplied to the inboard valve-operator on sone current BWR applications. Northern States Power feels that the dual power source does not enhance the reliability of the system to an extent that merits its inclusion in the design.

6. _Si te.

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' The flood-level analysis performed for Monticello was based ,

on the 1000 year flood. We asked N$P to furnish an analysis i based on the maximum probable flood. Although we do not anticipate a problem with flooding, we feel- this study should-be done to detensine the available margia.

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j R. S. Boyd ~3-l

7. Environmental Monitoriaa
  • It appears that the environmental analyses for air particulates, well water, river water, and milk will actually,be asesepitched by the Minnesota Departammt of Nealth. Northern States Power's .

function seems to be limited only to taking the samples. NSF did not make clear to what degree independent checks would be

, made. We told NSP that we would need detailed information -

describing the division of responsibility between NSP and the .

] Winnesota Department of Nealth for each item semprietag she ' ' yi '

monitoring program.

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8. Accalerometers 0 l

Northern States Power'will provide at least one accelerometer i for the Monticello site. The type (s) and location (s) are as I yet undetermined.

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C. J. Hale, Reactor Engineer '

Reactor Project Branch il Division of Reactor Licensing

/

Laclosures:

Attendance Lista Dis tribution:

Docket Fil .

RL Reading RPB-1 Reading D. J. Skovholt S. Levine ~

R. C. DeYoung D. R. Muller '

Branch Chiefs /RP -

CO (2) >

C. J. Hale -

D. B. Vassallo .

N. M. Blunt omer > ..EL.:RPA .l... .... . ...RL1RPA .1._ ..RL:PJ%1.. ................... .

sURNWt > .. hale 11Q . . . A110 ...... 1 r....... ................... . . . . . . . . . . . . . . . _.

DATT> ..h[.2[69.. . .t . . 5thh9.. ..... 5LI..L69.. . . . . . . . . . . . . . . . . .

Form AEC-stb (Rev. 9-S3) AECM 0240 e a sove..eset .aistios onics 1 s o.a -en

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ATTENDANCE LIST TECINICAL MEETING - HONTICELLO NUCLEAR CENERATING PLANT April 1, 1969 1

I Northern States Power Company AEC/DP1 4

H. H. Clarity D. R. Muller '

R. J. Jensen D. B. Vassallo '

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C. J. Ross 1. Spickler*

  • G. H. Jacobson C. J. Hale E. C. Ward T. A. Ippolito*

C. E. Larson H. J. Veiterhan*

G. YanaSita C. J. DeBevec*

A. W. McDermid A. L. Gluckmann*

W. A. Shamla .

L. R. Eliason General Electric Bechtel Corporation C. L. Davis J. V.,Carlson R. B. Gile L. V. Wolf J. W. Lingafelter

  • Part Time

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  • l DATE > . .. . . --- - - - - - - - - - - - - - - - - - - - - - -

! Form AI.C-Ste (Rev. 9-53) AECM 0240 e a nova..esev .. svene ore.cs , e o.a ..tv l

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ATTENDANCE LIST TECHNICAL MEETING - HONTICELLO NUCLEAR CENERATINC PLANT

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1 April 2. 1969

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.orthern W States Power Company AEC/DRL 1

R. J. Jensen D. R. Muller

! C. J. Ross D. 5. Vassallo L. R. Elisson C. J. Male G. H. Jacobson R. J. Mattoon*

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W. A. Shaula C. J. DeBevec*

l E. C. Ward H. Specter * *,

M. H. Clarity L. Forse*

C. E. Larson d

. General Electric '

) L. W. Wolf

J. W. Lingafeller l C. L. Davis F 1 i I

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  • Part Time i

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Foren AEC-118 (P.ev. 9.$3) AECM 0240 es sovs.esent..'stin.o'ensii.e.e-e est


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