ML19199A609

Requests Assistance for Review of Proposed Repair Procedures for B&W Control Rod Drive Motor Tubes

ML19199A609
Person / Time
Site:	Crane
Issue date:	06/06/1972
From:	Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC)
To:	Hendrie J US ATOMIC ENERGY COMMISSION (AEC)
References
NUDOCS 7905040356
Download: ML19199A609 (1)

Text

_

JUN 3 "E2 J. M.

!endria, Deputy Director for Technical Review 71recterate of Licensing T:C'2:ICAL ASSISTA' CE PCQU ST FCR REVIE'i 07 PROPOSED 2E? AIR ??,0CEDURES FOR 35*.? CO'! TROL RCD DRIVE MOTCR TUOE DISCC:iTI';UITIES 3abcock & T.'ilcox (3&U) infor cd the Arc at a "ay ll,1972 nectinc in Bethesda that many of the control rod drive (CD) notor tubes on all plants havin; 20;T ::SSS are suspect ci :ontaining hot tears on the inside tube curface. 05U is currcatly sscccin3 the need for repair or replacenant of cone of these C2D acscnblics. They tentatively propoced ocveral nethods for repairing thecc CRD notor tubes sone of which could involve exceptions fron AS:!E code requirements. Other poscibilitica are to lower the design require ents for these notor tubes or present a fracture mechanics analysis to show the acceptability of the existin;; rotor tubes with these discontinuitics. The assistance of the Mcchanical Engineering 3 ranch in the review of the proposed repair procedurco and design requirencnts for 35U control rod drive notor tubes is requested. In this rccard, it is also requested that the "echanical :ngineering Branch be represented at the June 6, 1972

=ceting in Lancaster, Ohio at Dianond Power's CRD canufacturing facility.

Any questions rc;;arding this entter should be directed to I. Pelner (Extension 7548) of PWR Branch No. 4.

Original signed by A. Giarnbusso _

~

A. Gianbusso, Deputy Director for Reactor Projects Directorate of Licensing

((

a:

cc:

F. Schroeder, L R. C. DeYoung, L DISTRIBUTION R. R.

2,ccary, L Central Files 7 uth' 7 D* C.c'Donalc, Docket Files (50-269/270/287/346/404/s405/289/3.0 h.

I 302/329/330/312/313)

R. ti. Klecker, L L Reading A. Schwencer, L D.. a_.. c,.

FWR-4 Reading u

I. A. Pelt.er, L D. Davis, L 1

\\

,)

kl.h.hh..

....hI., 5

.5.h.k.O.3,..

. b.;1D R?,..

2 0FTICE >

t

/7 E Gy I

K/

l

$URetAME > '

OY_i_3 I OUh.,

, bbC$jW$nCen_.RC%

..., l AG fI /

l I

f' Y 7, tj '

pg's.sq...

DATE >

! b /.

/.7 2_. _5 /.

..I 7 2,

..b..[ 7 2..

.J...

_. ]

b!

Forve A EC-lie e st e. 9-531 MCM 0240

' r. s. mv enurxT river 2.c orr'cr isie o - ei.s.e 7905040 MC.'

-