ML19207C057

Submits Proposed Change 81 to App a Tech Specs of License DPR-28 Re Reactor Vessel Pressure/Temp Limitations.Revision Depicts Allowable Heatup Curves for Reactor Operation. Class III Fee Encl

ML19207C057
Person / Time
Site:	Vermont Yankee File:NorthStar Vermont Yankee icon.png
Issue date:	08/27/1979
From:	Johnson W VERMONT YANKEE NUCLEAR POWER CORP.
To:	Ippolito T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
WVY-79-94, NUDOCS 7909060381
Download: ML19207C057 (4)

Text

s Proposed Change No. 81

[

V ERMONT Y A N K EE N ucLEAR power CON POR ATI()N SEVENTY SEVEN GROVE STREET WVY 79-94 PC-81-1 RU TI. AND. VERMONT 05701 HEPLY TO ENGINEERING OFFICE TURNPIKE RO AD August 27, 1979 wEsToORO, unssacsusETrs oisei TELEPHONE 617 366 9011 United States Nuclear Regulatory Commission Washington, D.C.

20555 Attention: Office of Nuclear Reactor Regulation T. A. Ippolito, Chief Operating Reactors Branch No. 3 Division of Operating Reactors Re ferences:

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

(b) General Electric Licensing Topical Report NEDO-21778-A;

" Transient Pressure Rises Affecting Fracture Toughness Requirements for Boiling Water Reactors", December, 1978.

Subject:

Reactor Vessel Pressure / Temperature Limitations Pursuant to Section 50.59 of the Commission's Rules and Regulations, Verment Yankee Nuclear Power Corporation hereby proposes the following modifications to Appendix A of the Operating License.

PROPOSED CHANGE:

A change is proposed to Figure 3.6.1 (Reactor Vesse] Pressure Temperature Limitations for operation through 1.3 x 108 MWH(t)) of the Vermont Yankee Technical Specifications.

The change, included as an attachment to this letter, depicts the revised allowable heatup curves for reactor operation.

BASIS FOR CHANGE:

The basis for this change is provided in Reference (b) which concluded that the probability of a water solid pressure transient concurrent with a control rod drop accident is sufficiently low such that current vessel pressure-temperature criticality limits may be lowered to allow heat up with nuclear heat.

The attached Figure 3.6.1 thus reflects this change.

The criticality curves shown are merely a continuation of the existing curves and are based on Reference (b) and that part of the proposed revision to 10CFR50, Appendix G which requires that the vessel temperature always be 400F above the AMSE Code, Appendix G calculated curves during criticality.

f _,* ). t;< ; 0 7909060

s United States Nuclear Regulatory Commission August 27, 1979 Attention: Office of Nuclear Reactor Regulation Page 2 REASON FOR CHANGE:

NRC approval of this change will permit the use of nuclear heat at lower temp eratures.

This can decrease both vessel heatup time during startup and heatup time to reach the temperatura needed for operational hydrostatic leak tests, thereby improving plant availability.

SAFETY CONSIDERATIONS:

This Technical Specification change is based on the information contained in NEDO-21778-A, Reference (b);

i.e.,

that this change is acceptable based on the low probability of a water solid pressure transient and the negligable effect of lowering the criticality limits.

One positive aspect of the proposed lowering of the criticality limits is the reduction in time spent at temperatures where fracture is of concern. Such a reduction of time spent in this region would imply less change of occurrence of a maintenance or testing operation that might inadvertently flood up and pressurize the vessel.

This submittal has been reviewed by the Vermont Yankee Nuclear Safety Audit and Review Committee.

FEE DETERMINATION:

This proposed change requires an approval that involves a single safety issue and is deemed not to involve a significant hazards consideration.

For these reasons, Vermont Yankee Nuclear Power Corporation proposes this change as a Class III Amendment.

A payment of $4,000.00 is enclosed.

Vermont Yankee believes that the NRC revised fee schedule is illegal. We are aware that this fee schedule is being contested before the U.S. Court of Appeals for the Fif th Circuit and therefore submit the enclosed fee under protest without waiving its right to contest the validity of this fee or the entire NRC fee schedule, and without waiving any right to recover, in whole or in part, all fees paid or to be paid under the invalid fee schedule.

SCHEDULE OF CHANGE:

The proposed change will be incorporated in to the Technical Specifications as soon as possible following receipt of your approval.

We trust this submittal is acceptable to you; however, should you have any questions, please contact us. f"'

Very truly yours, VERMONT YANKEE NUCLEAR POWER CORPORATION

/

• "}

W.

Johnson Vice President d=p

<> % e rs *3 x O rs'u) r Attachment

L United States Nuclear Regulatory Commission August 27, 1979 Attention: Office of Nuclear Reactor Regulation Page 3 COMMONWELATH OF MASSACHUSETTS)

)ss.

COUNTY OF WORCESTER

)

Then personally appeared before me, W. P. Johnson, who, being duly sworn, did state that he is Vice President of Vermont Yankee Nuclear Power Corporation, that he is duly authorized to execute and file the foregoing request in the name and on the behalf of Vermont Yankee Nuclear Power Corporation, and that the statements therein are true to the best of his knowledge and belief.

8 PII@!6* -((.,

Os 4 A 4

2 [6',m.

Robert H. Groce Notary Public My Commission Expires September 14, 1984

.s-m 7

'O' u

s, ',

r

$lC a

':!)

c,,.

y y,'4*)f s s > '

,>Iii lI

.il.'

, i I.

l1

,.I

.i - i. i q. ; ; i:!

0 1

!le 6

i 1

r 2

,'l

/

l I. _ -

1 i4-ey 4/-

l t r

\\

bi 0

i l n 4

q s ao 2

i

/..o0..,

s ci 0I

.l ii g

,+

r i.'

N t:r mt e

,i.

riR

@o.

4 a-PC l

er

~

\\>.',.

r p\\o >,.

2 '

2 i

l

. e 0

t.,:

c d ;, = a x n. -

2 c9

,e t

f p.,

• ,.94 p

/

s 1

G

m. 4 'm a

r c.

o' ii d((f' I

f',.

I Oa.

... s,.qb;. t. L

,t;

,i L 'm,,

i.

'i.

,pS

.+

p /. 3yig,-

0 m~

. h., s.A-

'0m e'

/

i

/,. '...

' G, "i. -

. j:

2 i.

, ~ i e

< c-

- ;fJ

.i.

,E 1l i

bi.t,

.hp n

/'l aJ.

. 4'r.

./. &.

)

J

.{ Il

..o(F y

+e' t

' c y.

0

?

1u e 8

i

-,/ - -., ;,q'.

}g.

h

tt

" U o i'

- s/"'

.;5 r

.iu-4 u

.1

i.._

1 e

.'t y

.r+.i.-

'l i,!r i'

t!.

a

.1, <. r )"

=u r

,. j i I

'.i.-#

.Y..

l o

[

.F e

,N.i'

,. iulJ.t _ / " :.e,, c ;.. -.

l 0m p

. ' -/

' /

.. ~

m

't 6

e

)

.' y 1u T P,

e, ~,

. /

/,

..m t g

( F m. '..'l. -,g jlp.,

n.

. t" g5 t,

h

,'i

.W,gD<','E/e 4Y ' ~.

g

,P,i' n

g a

6

1. j,p h ;.

4

- - ml y

+

,f.

s lo /-. '

e:

7 o

o.

.'g. / -

e s8 n

a.

, 0 o

c-lf.

...,.44 p

,g.

4m C r n0 =

K,;,

4 l

uo1 9

o/

,4

.. :. 1.i- :

+ 1 sixt 9,p. 4<., m {:i.-

F ;;.

i. l...:

n[!

i t

(...

st34 tlH i;

u r

+..'

9 o

0l N ea./

. y

. i.

c n

/r.

1 rt13

{:.,,4 ' oj,,

o-il

'M. '

,t..

n

.Pi ij3r..

t;..

j

,in a

6. l mh@

• • w it.

g

,. r_ 9 j1. i -.-

d. ;.

e

n R e

ig c

- [

3 eL uF c

. _ ~

o-0

• • h i

p-s o

• h.H.'.inL.e;l - b.

y.a P l-y.f g3,

_ ~

+ '1c g

D

,- 2u eser0 l

p N -

_. ~

r erh7 th.l.i'pf, W h,m.'li g:

• 'l

. '.i.,

7I uV uT+

+

i u l1 u.I

.q.

.o0 J" an. t

+

i ran=

'+

j n ]+, L!eo j:= i. C V,.

1,,.

g t

+@ f' i

^3..'.

. -,' 3 s. {b. ;..i J['

n.

ed l e mxb F or o 1

t eit lel'

't N o

i" c.!

cpt4 i "

i4

..t:

, y,,:: ii n

. 0 u,O l

b z

.i-l eer1

@'+'i4-c\\, n."

ama/

. oit sro

p0 tl 0

i sg I

1a_N sui

+:..

l,l'

.-. i' RT e

'*{

0 ~.

,n. -

yi.h H;I.

p@

dL H' l

s ~i.

mse O

.t H" ml4q9Ijj :i.

r eR l'

1i n1ln

{Qo -

.l, L.

T er

. i r D

.N i:,

PP

, mn-i

. e;.n.WL -

o N

.H i" n. l

. inNf!-

'[.

,i -" -

'. = -

j l

a"..

0u, f'T

.ii H.""

.p R

n!!yha. +m'!1.. F h i j~.-

• • l u!.

8

['

l Lg {.

L

!:h,

.q g

j.

. j. -

.i i a'i.'

'.hLh,

.= 7.. :.

1<..

1 H i' j.

t

- eI.

.a

i-l

.r. H,

- +

q

.lI l.ll'1 hH j

h : "' n!': ll l

n, l

J

,.i. :

' uh

.'Nm*pi h.u. l-l.py l,

!;I

, i -

e

' ~ H p'

.l b.hait t

h.b.FY. Hy l1, o

jJ l

u. i

. i

.I

'd.j

,t t

t,'

n.

• ll' jpI.!j l

!:.i.

' Jn: c;i

'b l"

, ;o 0u.

• .i t

,-ir

'6a

' H' l

r 0

.,i.

I:*

I.

c-0 '.

0 0

0 0

0 r-0 L,

4 2

0 0

0 0

0 0

na L x ~

"10

'f, 8 : ~

6i n

i.!

u 2-

'i' ci 1-i

,i ' -

g l!lt

-iI.I.l j t.I7:

2-i

-1

,: p :',

]l.J un-g l1'?

neHE. e9y m,kn. ^oeo:r ogv aEgou uOjco:a t

yg!w 3 y a 2_N-.

a

.,. x jr L -

qwy r

.. :. p 3!

-i c

.