ML20203J862

Forwards Study Plan for Containment Safety Study Interim Progress Rept,Per 860630 Commitment.Presentation Outline for 860806 Progress Meeting Also Encl

ML20203J862
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	08/01/1986
From:	Lodwick R VERMONT YANKEE NUCLEAR POWER CORP.
To:	Muller D Office of Nuclear Reactor Regulation
References
FVY86-69, NUDOCS 8608060041
Download: ML20203J862 (3)

Text

s VERMONT YANKEE NUCLEAR POWER CORPORATION i

FVY86-69 RD 5, Box 169, Ferry Road, Brattleboro, VT 05301

,,,L y,,

p ENGINEERING OFFICE 1671 WORCESTER ROAD v

FRAMINGHAM, MASSACHUSETTS 01701 TELEPHONE 617-872-8100 August 1, 1986 U.S. Nuclear Regulatory Commission Washington, D.C.

20555 Attn Office of Nuclear Reactor Regulation Daniel R. Muller Operating Reactors Branch No. 2 Division of Licensing

References:

a)

License No. DPR-28 (Docket No. 50-271) b)

Letter, J.G. Weigand to Harold Denton, dated 6/30/86

Subject:

Vermont Yankee Containment Safety Study Interim Progress Report By letter, Reference b), Vermont Yankee committed to perform a study of Vermont Yankee's Mark I containment to address enhancements to containment capa-bility which were not analyzed for the WASH-1400 reference plant, assess a best estimate Vermont Yankee specific conditional containment failure probability, and address the five elements presented by Robert Bernero at the June 16, 1986 meeting held in Bethesda.

To document our progress to date, enclosed please find a copy of our study plan, with task completion percentages noted (Attachment 1).

Additionally, we have enclosed a copy of our presentation outline for the August 6, 1986 progress meeting in Bethesda (Attachment 2).

We look forHard to this upct; ming opportunity to meet with you and discuss progress on the Vermont Yankee Containment Safety Study.

Very truly yours, I

ER ONT YANKE NUCLEAR POWER CORPORATION I kcu Richard J\\ Lodwick Operations Support Manager cc:

W. Houston l

V. Rooney State of Vermont Uj QO 8600060041 060001 I

PDR ADOCK 05000271 P

PDR i

ATTACHMENT 1 p%..

STATUS AS OF 08/01/86

==

N *s N y,

i u --

?.M

'c.

M er N"

voog_

[sm.ase

_ re,.

em

.0E l

man h

seis 7*

f

,.cs MI W

N.TMV

~_.T.Sy W *A.

i l

~

gam

.gg agpt.gf

.es ergee N lr#,#l '

n NN$ -

.eEE,"

t

_ 20.s 5'

=.

W sus M

.0.

- er Nem as m

~

m 7e maissene 4

_"_. av 8

.o.

gg g gg, M

s M.

F

=

spy,.

- FM-m.e =J' ar, l

y M C 48 aw l

~&

~

i l

ATTACHMENT 2 4

VERMONT YANKEE CONTAINMENT SAFETY STUDY I.

PURPOSE AND OBJECTIVE OF EACH TASK INCLUDING PRELIMINARY RESULTS MARK I DESIGN REVIEW o

WASH 1400 DESIGN COMPARIS0N o

VERMONT YANKEE DESIGN

SUMMARY

VERMONT YANKEE CONTAINMENT CAPABILITY o

VERMONT YANKEE APPROACH o

STUDIES AND RESOURCES USED o

ACCIDENTS AND TRANSIENTS STUDIED o

RESULTS UTILIZING KEY DIFFERENCES AT VERMONT YANKEE o

DEFINITION OF "90%"

o VY CONTAINMENT CONDITIONAL FAILURE PROBABILITY CURRENT MARK I ISSUES i

o DEFINITION AND TECHNICAL STATUS OF 5 ISSUES o

APPLICABILITY AND NEED FOR FURTHER STUDY t

o ACTIVE INDUSTRY AND NRC EFFORTS II.

STATUS

- RESULTS TO DATE

- SCHEDULE FOR COMPLETION

.