ML20125A573

From kanterella
Jump to navigation Jump to search
Informs That Licensee Will Replace All Sensitized Stainless Steel safe-ends Except for Recirculation Outlet Nozzles
ML20125A573
Person / Time
Site: Monticello Xcel Energy icon.png
Issue date: 05/22/1970
From: Morris P
US ATOMIC ENERGY COMMISSION (AEC)
To: Case E
US ATOMIC ENERGY COMMISSION (AEC)
References
NUDOCS 9212080399
Download: ML20125A573 (1)


Text

"' - " ' ' ' '

^

_ _ . _ _i_ _ _ _ _

. .r.

"" 1 a

+

04-  %~- 2 L jb '

i g t(1 W 2 2 910 E. C. Case, Director, Division of Reactor Standards, DRS SENSITIZED STAINLESS STEEL SAFE-ENDS -

MONTICELLO PLANT Northern States Power Company (NSP) has decided to replace all sensitized stainless steel safe-ends, except for the recircula-tion outlet norries. These latter safe-ends will be clad. In preparation for writing a report to the ACRS on this matter, we request your assistance in evaluating the acceptability of the approach proposed by NSP.

Amendment 26, dated May 7, 1970, describes the proposed modifi-cations to sensitized stainless components attached to the pressure vessel. A major concern is the acceptability of cladding both the inside and outside surfaces of the recirculation outlet nozzles, as proposed in Amendment 27, dated May 19.-1970. In this regard, the question is whether the clad overlay of the outside surface vill interfere with the sensitivity of the ultrasonic inspection.

An ACRS Subcomittee will take up the general subject of sensitized stainless steel components attached to the pressure vessel at a _

meeting to be held at Argonne on June 1-2, 1970. We would like to s have our report to the ACRS on the Monticello sensitised modifica-tions availa' ale to the Subcommittee for its consideration at that

(

time. Because the Monticello hearing will be resumed on June 15, 1970, we are seeking to have the ACRS formally consider and comment on the proposed Monticello modifications at its full meeting to be held on June 11-12, 1970.

en a. D U P. A. Morris, Director Division of Reactor Licensing Distribution:

Docket File / R. C'. DeYoung RL Reading Branch Chiefs /PWR

.+ PWR-1 Reading R. V. Klecker D. J. Skovholt D. B. Vassallo S.'Levine N, M. Blunt-F. Schroeder R. S. Boyd omer . RLiPWRi_, ,, ,,,RL :PWR-1 RL:Pb

,_,,L_,___

R a11.?:1 L.....Md .

=mt ..

_. .. _... JMis . . . . _ . . . . . . .

wr > 5/21/70 5 /1 ' / 70 5/+8/70

, - . - . - ----_.- Sh,0 _ ,

9212080399 700522 POR ADOCK 05000263

? . .. . . - . . .