ML18009A660

Concludes That No short-term Safety Concerns Associated W/ Thermal Stratification for 10 Addl Heatup/Cooldown Cycles of Plant Operation,Per NRC Bulletin 88-011

ML18009A660
Person / Time
Site:	Harris
Issue date:	09/12/1990
From:	Becker R Office of Nuclear Reactor Regulation
To:	Eury L CAROLINA POWER & LIGHT CO.
References
IEB-88-011, IEB-88-11, TAC-72137, NUDOCS 9009180069
Download: ML18009A660 (4)

Text

Docket No.

50-400 Mr. Lynn W. Eury Executive Vice President Power Supply Carolina Power 5 Light Company Post Office Box 1551 Raleigh, North Carolina 27602

Dear Mr. Eury:

September 12, 1990

SUBJECT:

NRC BULLETIN NO. 88-11, "PRESSURIZER SURGE LINE THERMAL STRATIFICATION" - EVALUATION OF WESTINGHOUSE OWNERS GROUP BOUNDING ANALYSIS - SHEARON HARRIS NUCLEAR POWER PLANT, UNIT 1 (TAC NO. 72137)

By letter dated February 28, 1989, Carolina Power 5 Light Company responded to Item 1.b of NRC Bulletin No. 88-11, Pressurizer Surge Line Thermal Stratification."

The letter stated that a bounding analysis performed by the Westinghouse Owner's Group (WOG), which applies to the Shearon Harris Nuclear Power Plant, Unit 1, indicates that when taking into account the effects of thermal stratification, the pressurizer surge line (PSL) may not satisfy the ASME Section III Code criteria for the life of the plant.

The analysis did, however, state that the integrity of the PSL was adequate to justify continued operation of the facility for several years.

The staff has completed its review of the WOG bounding analysis and concludes that there are no short-term safety concerns associated with the thermal stratification effects for a duration of 10 additional heatup/cooldown cycles of continued plant operation.

A copy of the evaluation which was sent to the WOG is enclosed for your information.

The staff will assess the conformance of the PSL to applicable Codes and regulatory requirements f'r 40-year plant life when the WOG report regarding Item 1.d of the Bulletin is submitted.

Enclosure:

As stated cc w/enclosure:

See next page DISTRIBUTION See attached page Sincerely, Orignal signed by:

Richard A. Becker, Project Manager Project Directorate II-1 Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation OFC: LA:PD NAME

PAnder n

PM: PDII-1

R D PDII"1

EAdensam DATE g gO/90 OFFICIAL RECORD Document Name:

fljO/90 COPY LTR'EURY 72137 t /(( /90

(-I 90091S0069 PDR ADGCK 9

900912 or000400

~ g ~Q'-"

PDC

~ 'I I uv

'4<<

u I N<<

NI

,Nv i

4

~

4 hi)

I 4

4 h

I

JkII, 4

u ',

44 I

I I

'I'/I

'I

'I vl 4 u ~

<<7 I

N

'I 4

I I

NIN "Pgt

~ 4 I I' I

It I' I

I I

4<<4

,4 t'4 4

',III I

I 4

'\\ <<

I 4 4

4 I

4 4

I I

I 4

N 4

~

u 4

4

~.

4 4 I

4/4 I

4 4

4 4

~

n I

I

~

=

'4 Nub VN u

Mr. L.

M. Eury Carolina Power 4 Light Company Shearon Harris CC:

Mr.

R.

E.

Jones-,

General Counsel Carolina Power 8 Light Company P. 0.

Box 1551

Raleigh, North Carolina 27602 Resident Inspector/Harris NPS c/o U.

S, Nuclear Regulatory Commission Route 1, Box 315B New Hill, North Carolina 27562 Mr.

R.

B. Richey, Manager Harris Nuclear Project Harris Nuclear Plant P.

0.

Box 165 New Hill, North Carolina 27562 Mr.

H.

A. Cole Special Deputy Attorney General State of North Carolina P.

0.

Box 629 Raleigh, North Carolina 27602 Regional Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street Suite 2900 Atlanta, Georgia 30323 Mr.

C.

S. Hinnant Plant General Manager Harris Nuclear Plant P.

0.

Box 165 New Hill, North Carolina 27562 Mr. Dayne H. Brown, Director Division of Radiation Protection N.

C. Department of Environmental, Commerce 8 Natural Resources P. 0.

Box 27687

Raleigh, North Carolina 27611-7687

l