ML20052G322

Forwards Core Surveillance Rept Containing Revised Power Distribution Limits Applicable to Cycle 2 Operation Per 820430 Discussion

ML20052G322
Person / Time
Site:	North Anna
Issue date:	05/07/1982
From:	Leasburg R VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	Harold Denton Office of Nuclear Reactor Regulation
References
279, NUDOCS 8205180254
Download: ML20052G322 (5)

Text

f-VINGINIA ELECTHIC AND POWER COMPANY l{ scHMOND, VINGINIA 20 061 H. H. La A siair mis vu.v...

May 7, 1982 NUCLEA AB uPENAT8QNW Mr.11arold R. Denton, Director Serial No.:

279 Office of Nuclear Reactor Regulation FR/GLD: plc Attn:

Mr. Robert A. Clark, Chief Docket No.:

50-339 Operating Reactors Branch No. 3 License No.: NPF-7 Division of Licensing U.S. Nuclear Regulatory Commission Washington, D.C.

20555 Centlemen:

REVISED CORE SURVEILLANCE REPORT FOR NORTH ANNA 2, CYCLE 2 As discussed with members of the Staff on April 30, 1982, the purpose of this letter is to transmit to you a Core Surveillance Report (CSR) containing revised power distribution limits applicable for Cycle 2 operation. As required by North Anna Unit No. 2 Technical Specification 6.9.1.10, my March 8, 1982 letter (Serial No. 131) provided you with the CSR containing the specific cycle 2 values for Fxy and the axial power distribution surveillance limit, Pm.

These limits were developed for use with a LOCA FQ limit of 2.10.

In an April 13, 1982 NRC letter (Serial No. 246), Amendment Nos. 39 and 20 approved the use of a LOCA Fq limit of 2.14 for North Anna Units No. 1 and 2.

Consequently, provides a revised CSR containing specific Cycle 2 values of Fxy and Pm appropriate for use with a LOCA Fq limit of 2.14.

We have revised the Fxy limit to a value of 1.60 for all unrodded core planes to take credit for the increased margin provided by the 2.14 Fq limit.

As discussed with the Staff we are requesting approval of the revised CSR prior to the North Anna 2 startup. While operation in accordance with the currently approved CSR limits will result in no operational constraints, approval of the revised CSR prior to startup would eliminate a change of limits during the cycle.

losl a

i !

82 0 51 R oggt e

a

vinc,141A D ECTklC AMD POh Ek tOMPANY To Mr. Harold R. Denton If you would like additional information, please contact this office.

Very truly yours, ur4N

( R. II. Leasburg Attachment (1) Core Surveillance Report for North Anna 2, Cycle 2 (Revision 1) cc:

Mr. James P. O'Reilly Regional Administrator Region II J

1

)

1 ATTACHMENT 1 Core Surveillance Report North Anna 2, Cycle 2 (Revision 1) 6

s e

Attachnnnt 1 1 of 2 TABLE 1 HORTH AHil A UNIT 2, CYCLE 2 CORE SURVEILLAMCE LIMITS, T2 = 2. 1 84 The T-XY limits for RATED TilERMAL POWER uitihin specific core planes I.

shall bei 1.

Txy-RTP 1.71 for all core planes containinD b ank D" control rods, and 2.

Txy-RTP

'1.60 for all unrodded core planes.

II.

The anini pouer distribution surveillance threshold pouer level shall bei 1.

Pm = 100% of RATED THERMAL POWER.

i e

6 O

y i

e w

e

unsuwuuwwums-u 2 of 2

.A NORT11 ANNA UNIT 2, CYCLE 2 T

MAXIMUM (F PRc1) vs. AXIAL CORC llEICllT Q

DURING NORMAL CORE OPERATION

._.. i

_..~..

.. ~

1.....

.....~

~ ~ ' '

MO

..~

.. s...

.g...

.s..

~,. y.

.a..s.

. i.

............{...

.~..

. t...

9... i.

' ~ ~

... ~. '.. _. '...

"s x*,

..l.

.....a

.. l,

\\

... ..~

3

~

_..t

....r....

b 2.00 s_...

.x _..-.,

. y i.

..4 -

t

..- : L..

.i.

Xx 3

I x

i T

x-H 1.o

....,. %., x..x x. X X. X. a....

t...

.. y

. -X -.. -

.f.

....i.....

....q.......

.. 4.......

-..1.

. -... 1.X....

.~.

.t

.....a..,.....

........... _.....1.. -.......,..

~t. X.,......

1.80

......_ i.

j

.t.

I

_ l...-.

1..

....P.;:* =..A. _ !._. *x i

..f.....

.......' l

.;;; L~

.2 Z.,.. *... 1. :.. ".

~:;.;{M.... ~r. ; In....

.. ;;J.C;...;. '.21..;;-" :=....g;;.

..g...

3....._.....-...

. _.. 6 I

n.

........ ~..

~.1.. _

~..

re

.t.._........

._....o...t...,

.... J..........

g1.60

.......'t...........

_. t.

A,..

1... -..

p7 4

I

... ~..

..3........1._...............

.._.. ~. _....

g, A,_.....

v l...,..

1..

1..

4...

..t.

.l

.. ~. i '

. i.

..~ * :..1.._..

..I

..s.

.l x

3

... l..

..T-~.

.i

,I

5. :..-

lC -.

1.........

.g.

.g.

r.

).

j

.. ~.

. J..

.~,

..l..

.t.

...y i

.t.

. i.

.l..

4 I.

s 1,..

0

.l.

. l,

......~

i.

4 l.

.I..

.e nve opc 1

. ~

~ ~ ~ ~

- -.. 2.14 0 0 f t.

t l

I 1.00

' 2.14 0 6 ft.

-~

.. 9.2.005 0 10.976 ft.

. d...

- T. 1.00 0 12 f t.

n g....

.l.-

I"'

~

[

=,

=.1 *.

.l a

0.80 i.

0 2

4-6 8

10~

12 Core lleight(fect)

.