ML20237D804

Discusses Steam Generator Temp/Pressure Limitations Based on Info from Plant Resident Inspectors.Plant Tech Specs Do Not Adequately Address Max Permissable Pressure for Corresponding Temp

ML20237D804
Person / Time
Site:	Point Beach
Issue date:	12/17/1987
From:	Wagner D Office of Nuclear Reactor Regulation
To:	Butcher E Office of Nuclear Reactor Regulation
References
NUDOCS 8712240203
Download: ML20237D804 (3)

Text

- _ _ _ _ _ _ _ - _ _ - _ _ _ _ _ _ _ _ . _ _ . _ _ _ ._

C

/ 6

'~.,,

UNITED STATES 1 8 o NUCLEAR REGULATORY COMMISSION

's WASHINGTON, D. C. 20555

{  ; ,E December 17, 1987 g . . . . . j/

(

1 i

MEMORANDUM FOR: Edward J. Butcher, Jr., Chief Technical Specification Branch Division of Operational Events Assessment 1

THRU: Kenneth E. Perkins, Director f Project Directorate III-3 J Division of Reactor Projects 1 FROM: David H. Wagner, Project Manager Project Directorate III-3 i Division of Reactor Projects III, IV, .

Y and Special Projects

SUBJECT:

STEAM GENERATOR TEMPERATURE / PRESSURE LIMITATIONS Westinghouse Standard Technical Specification 3/4.7.2, " Steam Generator Pressure / Temperature Limitation," requires that the temperatures of both the primary and secondary coolants in the steam generators be greater than i 70'F when the pressure of either coolant in the steam generator is greater than 200 psig. The STS Bases for this specification state that this is to prevent brittle fracture of steam generator metallic components. Point Beach 1as a similar Technical Specification (15.3.1.B.2).

I have been informed by the Point Beach Resident Inspectors that the " Owners' Manual" for the Point Beach steam generators specifies iri a figure (enclosed),

an " Acceptable Operating Region", based on temperature and pressure, for the -

steam generators. Although the Technical Specification in place' addresses a minimum temperature (70*F) at which the pressure may exceed 200 psig pursuant to the Standard Technical Specifications, the Owners' Manual contains a mini-mum and maximum pemissible pressure at 70*F. The maximum pemissible pressure at 70 F is not specified by the Technical Specification. It appears that the Technical Specification is based on only one Temperature / Pressure combination, namely a temperature of 70'F, pressure greater than 200 psig, f

whereas the Westinghouse Owners' Manual specifies a number of limiting temperature / pressure combinations.

l My concern is that the Technical Specification in place may not conservatively bound the steam generator temperature / pressure combinations, not only at Point Beach, but at other Westinghouse p,lants. Granted, the basis of the Technical Specification may be achieved by specifying a rriinimum temperature at CONI'ACI:

1 D. Wagner, X28158 8712240203 871217 DR ADOCK0500g6 1

L i

>' ,f f r 3 -.

which' system pressure may exceed:200'psig; hcwever, the Technical. Specification doesinot adequately address the maximum permissible pressure for'a correspond-ing temperature.

Original Signed By:

David H. Wagner, Project Manager Project Directorate 111-3 Division of Reactor Projects III, IV, V and Special' Projects

Enclosure:

As stated DISTRIBUTION:

A DocKet;f Ues w.

NRC'& Local PDRs '

PDIII-3 r/f

'DCrutchfield GHolahan PKreutzer DWagner.

.JSniezek KEPerkins

0ffice:

b h R LA/PDIII-3 PM/PDIII-3 PD/PD) 3 Surname: PKreutzer Wagner /tg KEPerkihs Date: 12/ (b/87 12/ lb /87 12/gj/87 ,

...a .. ..

iYi . \! N- N k r--

N- -

\! - - - \! k. l\- .-

- - .I .--

h b e

\!\- M. k...!\ Y \!-- \-- - *

~ t l '- -t N.. N N' \__. l! Y %

Y! 5 '

k! M\..  !

k. : .6

\ k, _\.

N ,!.

~

.. k, \. ..

i . . .b. . ., b.. 4...k.%

. .k. .,S:

j .

i  ;- \ ....j .

,;\ 4 1

. : ._.. L :_;.,_. . , .

. .. T

.. X . .

q. -.

a I .l \..l . N:%\ -

~t

! N-l\...I..\. ' '

I

.. I i

_1. .. . . h. .g. _ . . .

.I i N ... - '

s g Fw

,l 8

6

.N.._1N..

i

,' P) d

.oI N..., I  !

.N

.g . _ . . -

- l y ..q . . _ . .. .5 4.d .

N..I' .'

!I _.. . Y. . \ LY i N h ; N \1 N..L. .i N: -

,'l .

i l\ %. i .

. \. ..2.. tL U . \i h  ; ,

'\. '

un ,

p .\. \ . ...

' . ._ . . d

@W

... . M \.  :

.. . . \

& w . . .._. ... .i _ . . .. l sal y l  ; i N.. .  : N

, .l t .: -

i d

i\.

Ly. i -

N H i

4

. . . . .s

f. 5 0..

- 'l ..--

g,

. . . . _ . . . =. .

-a . ,_ .__.. i . _.

i . ! . vi.. .  : . ... . . \N! .-_.L.;

- W t t N- s .N..

l . i N- -

.., g.

W -

- I

i. .. b

;I . . . . .). . .

'J 1

F -

! ;l. l i { .

i

1

. l ..._ (,,

. {) ._ ,

1i l 1: 1 -

il r i

. . . t....._. -

..n . . .

i I t w

. . .L. . g 6

..i.. ' - -

I N .

l. .

. [ [. t. l.

. l ,

I i.

; ;I ,

4 . . .

L .;._ .-- . . _ .

g . .

! ... lI. ._.+. ... _- . .

N  :

l' I a - ' .l 5. .

• l i

. . . . . ,., . i . ....

j .

! N i

.1 . 4.

• l I  ! i

_ ;g il..

1

..1... . I N

.l I N

4 .

I .l,

.j Id '

' k. .

I . . . $,

. . .I k @ .

. ./.

i ..J . ._ . . ! l l

.AMWIM&W

.i  !

j

. - - _ _ _ _ _ _ - - - - _ _ - - - - - - - - - - - . - - - - . - - - --