ML20213D271: Difference between revisions

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=Text=
=Text=
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                                                                                                                                                                              ',/ CENTRAL FILE
',/ CENTRAL FILE iOdb,Nb$ bb. [U.E CDR JUL 7 1980 o47
        ;                                                iOdb,Nb$ bb. [U.E CDR
't l
        ;                                                                                          JUL 7 1980 o47     't l
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MDf0RANDUM FOR:                         B. J. Youngblood, Chief Licensing Projects Branch, DL                                                                                                                                                       '
MDf0RANDUM FOR:
FROM:                                 Franz P. Schauer, Chief Structural Engineering Branch, DE f                        
B. J. Youngblood, Chief Licensing Projects Branch, DL FROM:
Franz P. Schauer, Chief Structural Engineering Branch, DE f


==SUBJECT:==
==SUBJECT:==
WPPSS-2 SACRIFICIAL SHIELD WALL (SSW) CORRECTIVE s                                                               ACTION PLAN In accordance with your request the Structurni Engine 2 ring Branch has reviewed Burns and Roe Technical Memorandum No. 1173 which providee
WPPSS-2 SACRIFICIAL SHIELD WALL (SSW) CORRECTIVE s
      !                        Justification for the une of the partial penetration weld between SSV                                                                                                                           _
ACTION PLAN In accordance with your request the Structurni Engine 2 ring Branch has reviewed Burns and Roe Technical Memorandum No. 1173 which providee Justification for the une of the partial penetration weld between SSV rings 3 and 4 including SSW as-built dinension consideration. However, we do not have adequate background information of the problem such ao those references listed in the Technical Memorandum No. 1173, and are i
rings 3 and 4 including SSW as-built dinension consideration. However,
therefore at difficulty in performing an in-depth review. Furthermore, it appears that the corrective measures to be taken to transmit shcan at the interface of the channel and box rings are based on the idealistic
      ;                        we do not have adequate background information of the problem such ao
+
      ;                        those references listed in the Technical Memorandum No. 1173, and are i                         therefore at difficulty in performing an in-depth review. Furthermore,
distribution of design loads instead of the actual ~ defective conditions.
      ,                        it appears that the corrective measures to be taken to transmit shcan
    +
at the interface of the channel and box rings are based on the idealistic
      ;                        distribution of design loads instead of the actual ~ defective conditions.
t On this account we request the following additional information in order to complete our review on the SSU corrective action plant i
t On this account we request the following additional information in order to complete our review on the SSU corrective action plant i
    ,                        1.         References 1 thru 4 stated in Burns and Roe Technical Memorandum                                                                                                                                                   l No. 1173, dated Ifarch 19, 1990.
1.
    ',                        2..       Detailed drawings of the sacrificial shield wall. Identify the i
References 1 thru 4 stated in Burns and Roe Technical Memorandum l
type, nature, size, location and description of all defects, cracks, i                                   irregularities, or damages that exist in the sacrificial. shield wall
No. 1173, dated Ifarch 19, 1990.
    ;                                    and its reinted structures.
2..
: 3.       Calculation of design loads and load combinations, stress analyses i                                   of both the design structuro and the as-built structure with iden-l                                     tified defects. Identify any redistribution of loads in the strue-ture and at the box ring interfaces. Locate all the contact bearing areas at the interfaces. List all the assunptions and postulations used in the analyses.
Detailed drawings of the sacrificial shield wall. Identify the i
7
type, nature, size, location and description of all defects, cracks, i
: $      -P..             X29460                               i I
irregularities, or damages that exist in the sacrificial. shield wall and its reinted structures.
SEB:DE           '
3.
SEB:                       /
Calculation of design loads and load combinations, stress analyses i
                                                        .. 3.pj,7 . . . . . . . . . . . .D.E S..E.
of both the design structuro and the as-built structure with iden-l tified defects. Identify any redistribution of loads in the strue-ture and at the box ring interfaces. Locate all the contact bearing areas at the interfaces. List all the assunptions and postulations used in the analyses.
                                                                              . . .         .         . . SD<:.R. . . . . .T...... . . ... ..!.
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      !                                                                                                                                                     We also suggest a meeting with the applicant to expedite the understanding and resolution of the problem.                                                                                                                                                                                      .
! We also suggest a meeting with the applicant to expedite the understanding and resolution of the problem.
Franz P. Schauer, Chief Structural Engineering Branch Division of Engineering 1
Franz P. Schauer, Chief Structural Engineering Branch Division of Engineering 1
I               cc:               J. Faiaht I                '
I cc:
R. L. Tedesco                                                                                                                             -
J. Faiaht R. L. Tedesco I
      ,                                  D. Jeng                           -
D. Jeng D.' Lynch l
:                                  D.' Lynch l
S. Chan 1
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Latest revision as of 04:32, 4 December 2024

Requests Addl Info in Order to Complete Review on Sacrificial Shield Wall Corrective Action Plan
ML20213D271
Person / Time
Site: Columbia 
Issue date: 07/07/1980
From: Schauer F
Office of Nuclear Reactor Regulation
To: Yopungblood B, Youngblood B
Office of Nuclear Reactor Regulation
References
CON-WNP-0304, CON-WNP-304 NUDOCS 8008190121
Download: ML20213D271 (2)
v • d • e


Text

_

\\

',/ CENTRAL FILE iOdb,Nb$ bb. [U.E CDR JUL 7 1980 o47

't l

s 0

MDf0RANDUM FOR:

B. J. Youngblood, Chief Licensing Projects Branch, DL FROM:

Franz P. Schauer, Chief Structural Engineering Branch, DE f

SUBJECT:

WPPSS-2 SACRIFICIAL SHIELD WALL (SSW) CORRECTIVE s

ACTION PLAN In accordance with your request the Structurni Engine 2 ring Branch has reviewed Burns and Roe Technical Memorandum No. 1173 which providee Justification for the une of the partial penetration weld between SSV rings 3 and 4 including SSW as-built dinension consideration. However, we do not have adequate background information of the problem such ao those references listed in the Technical Memorandum No. 1173, and are i

therefore at difficulty in performing an in-depth review. Furthermore, it appears that the corrective measures to be taken to transmit shcan at the interface of the channel and box rings are based on the idealistic

+

distribution of design loads instead of the actual ~ defective conditions.

t On this account we request the following additional information in order to complete our review on the SSU corrective action plant i

1.

References 1 thru 4 stated in Burns and Roe Technical Memorandum l

No. 1173, dated Ifarch 19, 1990.

2..

Detailed drawings of the sacrificial shield wall. Identify the i

type, nature, size, location and description of all defects, cracks, i

irregularities, or damages that exist in the sacrificial. shield wall and its reinted structures.

3.

Calculation of design loads and load combinations, stress analyses i

of both the design structuro and the as-built structure with iden-l tified defects. Identify any redistribution of loads in the strue-ture and at the box ring interfaces. Locate all the contact bearing areas at the interfaces. List all the assunptions and postulations used in the analyses.

7 I

-P..

X29460 i

SEB:DE SEB:

/

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............D.ES..E. S :

D

.. 3.pj,7

..f.h.h/2,9,!.8.W,.........h de.",8....,

(.S.9 D a.').9X.........

en, sun a m. >

,... 6../..d..../. 8. 0......... 7./..*/../. 8 0 e 1.....(........

w.*

pe c somas He (p.te) pu os o m

...iim m m

4 i

i h

! We also suggest a meeting with the applicant to expedite the understanding and resolution of the problem.

Franz P. Schauer, Chief Structural Engineering Branch Division of Engineering 1

I cc:

J. Faiaht R. L. Tedesco I

D. Jeng D.' Lynch l

S. Chan 1

l t

lt i

1 I

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t i.

f f

I, L

f i

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5 t

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i wme*

sema = >

I SA?S

  • l Mac poem sie (9 76) NBCM 004 8 w.e. **ve=== eat m'a'ia s emm '"*
  • en n e

.

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