ML20148H203

Requests Review of ECCS Capabilities & Operating Procedures to Assure That Boron Precipitation Would Not Comprise long- Term Core Cooling Capability Following Loca.Requests Evaluation & Operating Procedures within 30 Days

ML20148H203
Person / Time
Site:	Yankee Rowe
Issue date:	03/14/1975
From:	Purple R Office of Nuclear Reactor Regulation
To:	Andognini G YANKEE ATOMIC ELECTRIC CO.
References
NUDOCS 8011170398
Download: ML20148H203 (3)

Text

, . -.--

~

f .' ,~ UNITED STATES

• ':M

, [ NUCLEAR REGULATORY COMMISSION W ASHli4GToN. o. C. 20355 VAR 14 1975 Docket No. 50-29 -

l Yankee Atomic Electric Company.

A'ITN: Mr. G. Carl Andognini, Assistant .

to the Vice President 20 Turnpike Road Westboro,!hssachusetts 01581 Gentlemen: -

Although your emergency core cooling systems generally satisfy our requirements with regard to long-term cooling, the system configurations ..,..,,

have not been specifically evaluated to show that significant changes in chemical concentrations would not. occur during the long term after a loss-of-coolant accident (LOCA) and these potential changes have not been specifically addressed by appropriate operating procedures. Accordingly, you should review your system capabilities and operating procedures to assure that boron precipitation would not compromisc long-term core cooling capability following a LOCA. This review should consider all aspects of your design, including component qualification in the LOCA environment in addition to a detailed review of operating procedures.

You should examine the vulnerability of your design to singic failures that would result in any significant boron precipitation. l 1

You should submit this evaluation and associated operating procedures within 30 days of receipt of this letter. These procedures should be promptly effected to assure that boron precipitation would not interfere '

with the ability of your facility to conform to Criterion (5) of 10 CFR  :

50. 46 (b) . We will inform you as to the acceptability of your evaluation and e.ssociated operating procedures.

While solute concentrations may be subject to control through operating procedures, equipment modifications may be required or desirabic to simplify such procedures. Your submittal should include a plan for ,

completing such modifications within six months of the date of this '

' letter.

mwwwg' _ . . ~

g g

8011170 ) [ - "

- (:;.

• e ,

' ~

^' "* " " ' ' '

'O'"'YaE*"*"P"Y .- 2- -

NAR34 W5 p

'This request for generic information was approved by GAO under a

' blanket clearance number B-IS0225 (R0072);.this clearance expires -

July 31, 19*, .'. -

Sincerely, Originalni: led by R. A. Ib710 Robert A. Purple, Chief Operating Reactors Branch #1 y Division of Reactor Licensing  ; ,

~

cc: 'See next page

~

t..2

[9:;:: . . .

j;(.

r:

f h: -

ll; e  :;

DISTRIBUTION l 7 i

Docket File "

NRC PDR l:

Local PDR

• ORB #1 Reading KRGoller TJCarter -

SVarga ..j RAPurple ABorger :j S"Sheppard j OELD OISE (3) - ..

ACRS (14) -l 1

c]

c, ic e , RL: 0RB# l.. i . RL.:..0RIMO de c.d.. . . . . .

/u. . . .

g ,, . . .;

...u-s, ABurger:de RAP urple... , _ , _ _ , , , ,

ie  !

om

• 3/13/75 3/# /75 ..

orm ac.3n arv. 9.sn Arcu c:40 W u. .. oovaa>.nur camw. or rico i.u.u.. .. j

Y:nkts Atomic Elderric Company -3~

MAR 141975 cc: Mr. Donald G. Allen,' President ..

Yankee Atomic Electric Company '

20 Turnpike Road .i Westboro, ibssachusetts 01581 I

i I

e