View source for BECO-89-084, Forwards Addl Info Re 880804 Response to Generic Ltr 88-01 Concerning NRC Position on IGSCC in BWR Austenitic Stainless Steel Piping,Per NRC 890331 Request

{{Adams
| number = ML20245G389
| issue date = 06/19/1989
| title = Forwards Addl Info Re 880804 Response to Generic Ltr 88-01 Concerning NRC Position on IGSCC in BWR Austenitic Stainless Steel Piping,Per NRC 890331 Request
| author name = Bird R
| author affiliation = BOSTON EDISON CO.
| addressee name = 
| addressee affiliation = NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
| docket = 05000293
| license number = 
| contact person = 
| document report number = BECO-89-084, BECO-89-84, GL-88-01, GL-88-1, TAC-69153, NUDOCS 8906290122
| document type = CORRESPONDENCE-LETTERS, INCOMING CORRESPONDENCE, UTILITY TO NRC
| page count = 25
| project = TAC:69153
| stage = Other
}}

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Generic. Letter 88-01   -
f 80SFDN EDfSON Pilgrim Nuclear Power Station                           !
Rocky Hill Road                                 j Plymouth, Massachusetts 02360                             1 Ralph G. Bird senior Vice President - Nuclear                                       BECo 89-084             I U.S. Nuclear Regulatory Commission                                    June 19, 1989 Document Control Desk Hashington, DC 20555 License DPR-35          )
Docket 50-293           j RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION, GENERIC LETTER (GL) 88-01: NRC POSITION ON IGSCC IN BWR AUSTENITIC STAINLESS STEEL PIPING (TAC 69153)
In your request for additional information (RAI) dated March 31, 1989, you requested Boston Edison Company to resubmit information similar to that provided in our response to Generic Letter 88-01 dated August 4. 1988. The attached tables and responses to specific RAI items contain thu information in the requested formats. As requested, we are sending a copy of this letter and its attachments to your contractor, Dr. Armand A. Lakner, of Viking Systems j          International.
R. G. Bird GGW/amm/3309 Attachments:           Table 1:   Responses to NRC Staff Positions Table 2: History of Helds and Prior Mitigation Actions /
Treatments Table 3: Inspection Schedules Response to RAI Items 3 and 4 Table 4: Licensee Positions on Leakage Detection Response to Attachment B cc: On next page h
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          *) ,     . BOSTON EDISON COMPANY-U,. S. Nuclea'r Regulatory Coreission Page Two cc:       Mr. D. Mcdonald. Project Manager Division of Reactor Projects - I/II Office of Nuclear Reactor Regulation Mail Stop: 14D1 U. S. Nuclear Regulatory Commission 1 White Flint North 11555 Rockville Pike Rockville, MD 02852 U. S. Nuclear Regulatory Commission Region I 475 Allendale Road King of Prussia, PA 19406 Senior NRC Resident Inspector Pilgrim Nuclear Power Station Dr. Armand A. Lakner Director, Safety and Reliability
[ -.                              Viking Systems International I.                                101 Chestnut Street Gaithersburg, MD 20877

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TABLE 1 Response to NRC Staff Positions BECo Resoonse                BECo Has/ Hill Accept    Requests with     Alternate   Applied   Consider for Staff Position            Accept    Provisions Position     in Past    Future Use_
: 1. Materials                Yes                              Yes         Yes
: 2. Processes               Yes                              Yes         Yes
: 3. Hater Chemistry          Yes                              Yes         Yes
: 4. Held Overlay             Yes                              Yes (d)     Yes
: 5. Partial Replacement     Yes                              No          Yes
: 6. Stress Improvement      Yes                              No          Yes of Cracked Heldments
: 7. Clamping Devices         Yes                              No          Yes l
: 8. Crack Evaluation         Yes                              Yes         Yes and Repair Criteria l                             9. Inspection Method       Yes                              Yes         Yes i                                  and Personnel
: 10. Inspection Schedule      Yes                              Yes(a)      Yes
: 11. Sample Expansion                            Yes(b)        Yes         Yes
: 12. Leak Detection           Yes(c)                           Yes(a)      Yes
: 13. Reporting                Yes                              Yes         Yes Requirements Notes:     (a) Per GL 84-11 (b) See BECo response to GL 88-01, Attachment A, page 4 (c) See BECo response to GL 88-01, Attachment A, page 5 (d) See BECo response to GL 88-01, Attachment A, page 2

        ,.            ,                    TABLE 2 (9 pages)
,                     History of Welds and Prior Mitiaatina Actions / Treatments
                                                             ~
                                         . LEGEND FOR TABLE 2 All weld . numbers are 'taken from ISI. isometric drawings
             ~*
Line number format: XX-YY-ZZ'
                 -Where:
XX - pipe nominal o.d.
YY = pipe material per BECo specification H-300 L                        'ZZ = system number Legend for Material Codes:
LCS = Low Carbon Steel NG - Nuclear Grade Stainless Steel i
316L with Carbon 0.020 or less Nitrogen 0.06/0.100 LAS - Low Alloy Steel CF8M - Cast Stainless Steel, comparative to 316 wrought grades.
System Abbreviations:
RHR - Residual Heat Removal RWCU - Reactor Water Clean up CS - Core Spray RECIRC - Recirculation RPV - Reactor Pressure Vessel 1
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2    ig =                   A A A A A A A A A A A A A A A A A A A A A A A A A A A A A A iL u        C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C E    t                N     D- D- -   D -D -D -D - D- D- D- D             D D D D D D D D D D D D D D D D D D D D L    i                 ~
B    M                      8 8 8 8 2 2 21 121 121 2                       2 2 2 2 8 8 8 8 8 8 8 8 8 8 8 8 8 8 8                                                      8 A                           2 2 2 2 1                                1 1 1                                 1 2 2 2 2 2 2 1 1                                      1 1 1         1           1 1 1 T      r                                                                -
-               i o -
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                     =       c         B B 8 B B B B B B B B B B B A A A B B B 1 1 1 1 1 1                                                                                                             1 1 1 d          i g            - - - -          -   - - - -         -     - - - - - - - - - - - - - - - - - - - -
n =_       r n        R R R R            R   R R R R           R    R R R R R R R R R R 0 0 0 0 0 01 0 1 0 10 01 1 1 a _      t i         2 2 2 2 2           2 2 2 2 2 2          2    2 2 2 2 2 2 2 2                                                                                                   1 1
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WE o          WEW                          O          E                         E            O O O O O O O C           0 V O P E P E D E S E D E P C C C C C C E E O E O EP OP VB PE BV P B L P L 9 L B M P M P A P OE P A RP M                                                                                                                                  L    A L A L U                  I    O     I          I         I        E      I      O R R R R R R                              I     I    L     !   L   I E V E P P C                         P H P          C     P N P C B B B B B B P P                                                      E P E P E V 1 2               1 2 C C               C C B B               B B               0 1 A 2 3 4 5 6 2  3-  2 3 1 9 9 A                                   7 7 1 1                     1     1 r  6 8- -9 2              - -                                                                        1      - - - - - - - - - - - -
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a 8   6 6 6 6 41 60 M 6 6 6 N 8 M 8 6 6 6 6 B N S 1 16 6 6F 66 C61 B1 N                                          1 6      1 1 F 6 1 F 1 1         1              1      6 1 1       1   6 F 6 F                1     1 i          C 3 3 3 3 3 3 1 3 3 3 1 C 1                                          C 3 3 3 3 C 1                       L 3 3 3 3 3 C 1 3 r         /   /    / /   / / / 3 / / / 3 / 3 / /                    /   / /       /    3   /  / / / / / / 3              /
e        G   G    G G   G G G / G G G / G / G G                    G   G G       G    /   G  G G G G G G /              G t         M   N   P N   N M N M N N N M M M N N N                    N   N N      M    N   N  N N M N N M N a        6   61  61 6  6    6 6 8 6 6F 161 18 6 8 6F 6             6   6F 1 61   6    8   6  6 6 16 6      6F 6     8  6 M          1             1 1 1 1                                 1                1 1                    1        1 1 1  1 1 1 1                 F 1 3   3   3 3   3 3 3 C 3 3 3 C 3 C 3 3                     3   3 3       3    C   3  3 3 3 3 3 3 C             3 m
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it N  D D D D D D D D D D D D D D D D D                             D D D D D D D D D D D D D L
B    H                   8   8 8  8 8- 8 -8 8- 8 -8        1 -1 1- 181 81 28 2 82 20 202 02 20 2 02 0                         0 0 0 0 0 0 0 0 A                        1 1 1 1 1 1 1 1 1                                                                                          2 2 2 2 T     r o =
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a         6 6 S         6 8 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 81 6 6 61 6 4 14 M           1     1   A   1    F  1    1     1   1   1   1    1    1    1     1    1    1     1         1          1            F   1   1    1 3 3 L 3 C 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 C 3 3 3 3 3 3                                                               -
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1     1   I   I    1  1    1     1   1   1   1    1    1    1     I    I    I     1    1    I    I     1     1      1   I   1    I f     =
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E  t                    N      D D D D D D D D A D D L
B i
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                                                                 - - - - - - - - E - - D- -DE AE iAE AE EAE AE EAE A 0 0 0 0 0 0 0 0 - 8 P 8 8 - - - - - - - - - - - - - - - - -
E EAE A      E EAE A     E    A A A A A A A                             1 1 1 1 1 1 1 1 4 1 1 1 1 6 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 T  r i
o r                                                                                                                                         -
P                                                                   A                          A A A A A A A A A A A A A A A A A c              1 1 1 1 1 1 1 1 5 1 1 1 1 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 d          i g n          r n             4 4 4 4 4 4 4 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 a =       t i              1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
                                        =      e w               - - - - - - - - - - - - - - - - - - - - - I- - - - - - - - -
d s =        m o r a      I I 1           I   I I I I            1 1 1 1 1 t I      I I I t I I I I I I I I I I l            s D             I     I     1   I   1 I        I   1   I    1 1 1           1    I I I I I I I                      I I           t I I        I I I I t e        i                 S   SI 15 S 5I S 1 S 5        SI 5 1S 5I 5 1 S1 1S1 IS I SI ISI ISI S     S S S S S S S S S s W                            I                         I                                           I I                                         I     I I    I     I      I I I f
o                                                                                 WW y
WW N                   OO                          O O r                                O                   B B               D         B B o                                I                   L L               A         L L E t           n                     T                   E E               E         E E G                                                                 R s          o                     A                                     H                     N                                                         E i -        i                       R                   OO                          O O A                    E E                                      WC                  E H           t                E T E W                   T T          W D E T T L W - P G E W E W E O U E E V W E a               P E P O E                          E O E P I                     F O E         I    N P O P O P B DI V P L O P I r               I     N I       B PI N N P B IU                       N N               B P    P A       I B I B                        L E L               A B     I u               P E P L                   O  O         L  L   P    O  O   O   L             I       L P L P L P E R A P V L P g                     P         E P       I    I   P E F              I     I    T E P O F                    E             E                  V                  E i                 O           O             T T                     O T T                        T         O          O             O O 0              OO             O f                 T OT T C O A A O O O T A A R O                             O                        O T O T O T T 7 O T T O T n                                                                     R R E      T T E T                      T             T                  T -                T C
o               E           W T T R RT TT T T                     E T T C V E O E E E E E E E V E E U E E N E O E O E O V O E V O E O G         W          W             WEW                EW             W L P B P P N N P P P L N N D P P A P B P B P B L B P L B P B                                                                          A L A     I     L   I   I     E E      I   I    I     A E E E               I   I  L    I    L    I     L I L A L                  I                  I L V P E P P P P P P P V P P R P P F P E P E P E V E P V E P E A                  2 2 6 6 1 3 4 5 1 1 - -                           0 1 2 3 4 5 6 7 8 9                                    0 1 2 r      9 7 8 9 0 1 1 2 2 1 1                                            1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 ,
                                                                                                                                                                                                                /,
d e               1 1 1 1 2 - - - - - - A B - - - - - - - - - - - - - - -
                                                                 - - - - - A B B S A A                                           S S S S S S S S S S S S S S S S e pb l                                                                       I     I A B B B B - - -                        M    I     I    - - M M M M M H H H M H M M H M M M #
W uN            4
                                                                 - - - - - R R R - - - R R - - - - - - - - - - - - - - - - -
4 4 4 4 4 4 4 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 m
e 6                      t s                                                      R R R R R R R R R R R R R R R R R R R R R R y               S S S S S S S S M M M N M N M M N N M M N N M M N H N M H M S                C C C C C C C C R R R R R R R R R R R R R R R R R R R R R R
                            . 9 o8                                 .
D    D D      D D D D D D D D D D D D D D D D D D D D D                                                   D     D   D D D D N /
7               C g C e C
C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C
C C
C C C C C C C C C C e0 g /                   S t              S    S S      S S S S S S S S S S S S S S S S S S S S S                                                   S     S   S S S S a 6                   G a              G    GI I G   G G G G GI I G G I G IG G G G G G G G GI G G I G IGI G                                      G     G   G IGI I G               I     I I P 0                    I         C      I               I   I     I                       I   I     I     I     I   I       I                       I     I                  I r        llli!I

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4    4 4 4 4 6 L L L L L L L L L L 6 S 4 '4 0 0 0 0 0 1 / / / / / / / / / / 1 C 0 0 0 0 0 0 0 0 F / 0 0 4 4 4 4 4 4 8 3 4 4 e            3 3 3 3 3 3 G G G G G G G G G G 3 L 3 3 3 3 3 3 3 3 C G 3 3 t             //////N N N N N N N M M N / //////////N //
a           4 4 4 4 4 S 6 6 6 6 6 6 6 6 6 6 S 4 4 4 4 4 4 4 4 4 4 6 4 4 M             0 0 0 0 0 A 1 1                     1 1 1 1       1 1 1 1            A 0 0 0 0 0 0 0 0 0 0 1 0 0 3 3 3 3 3 L 3 3 3 3 3 3 3 3 3 3 L 3 3 3 3 3 3 3 3 3 3 3 3 3 m
r o o N f /
no e s                        S S S S S S S S S S S S oO O oO E E E E E E E E E E E E oO ooO O oO O O O O O s    _ C Y           N N N N N Y Y Y Y Y Y Y Y Y Y Y Y N N N N N N N N N N N N N t    _
n    _
                               .e     _                                                                                         M                                             MM m    _                                                                                         R                   M M M M M                 R R t =
a =    o n                                                                                                         R R R R R V V V 3 3 3 3 e
r i             L L L L L L L L L L L L L L L L L V                                                           X X X X X L V V t            L L L L L L L L L L L L L L L L L                                               1 1 1 1 H H H H H L T         a           E E E E E E E E E E E E E E E E E R 1 1 1 1                                                                       E R R c
                                /
n s
L o           W W W W W W W W W W W W WWWY Y Y Y Y Y Y Y Y Y Y Y Y Y R R R R R R R R R R R R R R R R R Y Y W  R    WWHW1W1W1W1WCUW     CU  C CUC U WWR Y RUR W H H i
o                    D D D D D D D D D D D D D D D D D A B B B B R R R R R D A A t
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                               . A g                                                                                                                                     2
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t        e e                             2 2 2 2 2 2 2 2 2 2 2                                   -                                     A v                          2 a =
g =
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i ns L u r
0 0 0 0 0 - - - - - - - - - - -
1 1 1 1          1 A A A A A A A A A A A
                                                         - - - - - C C C C C C C C C C C L 2 2 2 2 2 2 2 2 2 E 2 2 D 1 1 1 1 1 1 1 1 1 / 1 1
                                                                                                                                / - - - - - - - - - A - -
E     t =             N    A A A A A D D D D D D D D D D D                                           A A A A A A A A A A C A A L    i =                   E E E E E - - - - - - - - - - - A D E E E E E E E                         E E D D D B     M =                     - - - - - 8 2 2 2 2 2 2 2 2 2 2 / - - - - - - - - -                    - - - -
A         =                4 4 4 4 4 2 1 1 1 1 1 1 1 1 1 1 N 6 6 6 6 6 6 6 6 6 6 64 4 T     r =
                               - o
                               - i ==
-                                r =
P =                   A A A A A
                                     =    c           5 5     5 5 A A A A A A B B B B B 4 2 1 1 1 1 1 1 1 1 1 1 2 2 d =     i g n =     r n         0 0 0 0 0 R R R R R R R R R R R 4 2 2 2 2 2 2 2 2 2 2 2                            2 2 a =    t i          1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 5 1 1 1 1 1 1 1 1 1 1 1 1 1
                                     =    e w            - - - - - - - - - - - - - - - - - - - - - - - - - - - -                         - -
s =     m o r a    I     I I I I       I    I    I I I I I t I I     I I I I I 1 1 I   I    I  1   I   I     I   I d =
i =       s D         I     I I     I  I  I    I    I     I I I I I          I  I     I I       I     I   I  1   1  I   I I     1 1     1 1 1 e     I             S S S S S S S S S S S S S S S S S S S S S 5 S S S S 5 5 5                          5 W                     I     I    I  I  I  I I       I I I I           I I    I   I    I I I I I 1 1 I                   I    I  1 1     1     1   1 f
o                                                                                                                                     N
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W O E E' W E F N N N N N N N N N N F P O P A I     T             W E W E E E C E A P E E D E O P O P IV N U P r           B P        I  B  I  S oO O O O O O O O O S                                      N P N P B              B  I L E D           I u           L I        P L P         T T T T T T T T T T                              O E       I  E   I  L P L P A P E P g           E P           E     O                                                O T P P B P E                     E      V         *
 -                                      i                        O     O T D D D D D D D D D D T                                                        O       O       O         O f             O O T O T                N N N N N N N N N N                              R 0 O O O O T O T O T O T n           T T           T     E E E E E E E E E E E E E F T T T T                                                T W - T W      T W
o                      W     W L                                                 L C                          W C             E E O E O Z E E E E E E E E E E Z U E E E D E O E O E O E O P PI B P BI Z F F F F F F F F F F Z D P P P N P B P B PI B IP B I I          L     L 0 A A A A A A A A A A 0 E                                    I          E      L    I  L   I   L     I   L P P E P E N S S S S S S S S S S N R                                             P P P B P E P E P E P E 1
1 1 1 1 1 1 1 1 1 1 1                              -                                         3 r   5 6 7 8 9 - - - - - - - - - - - B 6 4 5 6 7 8 90 1 2 2 7 8 d    e           - - - - - 9 A1 8 C D E F C H J K 9 1 2 2 2 2 2 2 3 3 3 -                                                             1 1 l
e      ss   S S S S S                2 2 2 2 2 2 2 2 2 2 N - - - - - - - - - -
H H H H H N N N M N N N N N N L -                                         I     0 0 0 0 0 0 0 0 0 -
0 -I - I W        N t      - - - - - - - - - - - - - - - - V - - - - - - - - - - R - -
0 0 0 0 0 R R R R R R R R R R R P 2 2 2 2 2 1 21 1 21 121 121 121 121 12 2 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 R             '
m e
7                     t                                                                                      U U U U U U U U U U U U U s           R R R R R V V V V V V V V V V V V C C C C C C C C C C C C C y           H M H H H P P P P P P P P P P P P W W W W W W W W W W W W W S             R R R R R R R R R R R R R R R R R R R R R R R R R R R R R R
                      . 9 o8                               D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D N /                             .
7              C g C e C     C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C C CC CC CC CCC CC CC C         C C C C C C C C C C C C C e0 g /                S t           S S S S S S S S S S S S S S S S S                           S S S S S S S S S S S S S a6                 G a           G G G G G G G G G G G G G G G G G G                          G G G G G G G G G G G G P 0                 I        C    I     I I     I  I  I    I    I     I     I   I I I    I   I    I    I    I     I   I  I   I  I   I    I  I   I   I     I   I l!lll!                       l                lI      j'

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a        4  4    4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 8 S S 4 4 4 4                                                                4 M          0   0    0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 F A C 0 0                    0 0                                            0 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 C L L 3 3 3 3                                                                    3 m
r o o N f     /
n s                                                                                                                         O o e       O O O oO O ooO O O oooO oO O O O O O O O s          C Y        N N N N N N N N N N N N N N N N N N N N N N N N                                                                    N t
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                =
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ig           iL     t     - - - - - - - - - - - - - - - - - -                                                   B C C C C                  C E  t                 N    A A A A A A A A A A A A A A A A A A                                                     D D D D D                  D L                         D D D D B
i M                         - - - - D D          -   - -D - -D  - -D- -D- -D- D- - D / 0D 0 D D D D A - - 0 0 8                              8 A                         4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 N                                                   1    1   1 1       1       1 T   r o                                                                                                                          1 i
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                =       c         2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 4 2 2 2 2                                                              1       1 d =                g      - - - - - - - - - - - - - - - - - - - - - - - -                                                                    -
n =
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                =        e w        - - - - - - - - - - - - - - - - - - - - - I - 1                                                               -
s =          m o r a     1     1    1   1     I   I    1     1 1   1     I 1    I    I   I                1    I    I   1 1     1       I d =
l     =        s D      1     1    1   1     I   1    1     1    1  1     1 1    1    1   I  I   1     1   1    I    I   1   1     1       I e          I          5 S        S 5 S 5            5 5 5 5 5 S 5 5 S                      S 5 5 5            S    S 5 5 5               S W _       _
1     1    1   1     I   1    1     1   1   1     1 1   1     1   I  I   1     1   1    I    I   1   1     1       I f         _
o _                                                                                                                               D      D y _                                                                                                                              E       E r _                                                                                                      D                       U       U o _                                                                                                      N                       L       L t         _   n                                                                                           E                       F       F s =          o i =                                                                                                        E                       O       O H           it         WWW                  EW             E W E W E W E W E W E F                             E E          E T           T a        O O O E              P O E P O P O P O P O P IO PB A P BV E VS                                                     N r        B B B          P     I   B P        !    B  I     B I   B            I         I        I    L P L N u        L L L          I     P L      I     P L P L         P   L P L P L              P        P A      I   A O           O ig         E E E P                  E P            E         E      E        E      E         O         V P V         I       I O              O       O       O         O      O         O T O                       T       T f          O O O O T O O T O T O T O T TO T O T                                                    T O O O A                  A n        T T T T                  T T            T W
T         T      T         E         T T T R               R o                             W              W               W         W      W         E L W V Z O E E E E D E D E E E T       T C          E E E E O E E O E O E O E O E O                                            t:
P     P P P B P               P B P B P B P                   B P B P L Z B P P P N A IN A P P P I     I    I   !     L   I    I     L   I   L     I L   I     L   I  L   I     A 0 L         I       I     E E E E P     P P P E P               P E        P E P E P E P E P V N E P P P P H P H 1        1 5        4 2        1 0        0 0        0 3        3 1      -  1     -       A       A A              A                                                      - 4 3 4         1 3           3 r    9     1    3 3 4 5 5 6 7 8 9 0                          1     2 3 4 5 6 A               1    F 1     F     1       1 d e        1     2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 9 - - - - -                                                                B l     b      - - - - - - - - -I 1- - - - - - - N C 4 IC 4 A I e n      !     1    1   I     I   I                  I     1 1   I     I   I      t           - D     1   D 1       I       I W     t      - - - - - - - - - - - - - - - - - - V / - / - -
0 N    2 2 2 2 2 2 22 2 2 2 2 2 2 2 2 2 2 2 PR DB D CD DB C 10 1     1    1   1     1   1          1   1   1     1 1   1     1   1  1   1     1                                   1 m
e 8                    t          U U U U U                L' U U U U U U U U U U U U s        C C C C C C C C C C C C C C C C C C V                                                                       R      R y        W W W W W W W W W W W W W W W W W W P S S S S H                                                                    H S          R R R R R R R R R R R R R R R R R R R C C C C R                                                                    R
    . 9                                                                                                                                              G o 8                           .
D D D D D D D D D D D D D D D D D D E G G G G G N /                                                                                                                                                C 7                C g        C C C C C C C C C C C C C C C C C C C C C C C C                                                                    C e0                   C e        C C C C C C C C C C C C C C C C C C C C C C C C                                                                    S g /                  S     t    S S S S S S S S S S S S S GS G                      S GS GS GSG SG SG S       S S S G G G G G G a 6                  G a        G G G G G G G G G G                                                                              I   I     I       IG P 0                  I     C    I     I    I   I     I   I    I     I   I   I     I I    I    I   I  I   I     I   I    I    I

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TABLE 3'(6'pages)
Insoection Schedule 1 i
NOTES FOR TABLE 3 HQ1ES
* The total number of welds scheduled for examination each outage shall be maintained but alternate welds may be substituted based on plant conditions.
* RF0 #6, December 1983 to December 1984 RF0 #7, April 1986 to December 1988 RF0 #8, Presently scheduled for 1/6/91 thru 3/16/91 RF0 #9, Presently scheduled for 5/23/93 thru 8/1/93 Information Concernina the Flaw Indication In RPV-N9A-1 An indication in the N9A-1 nozzle to safe end weld was ultrasonically located during RF0 #6. A weld overlay repair was performed'in accordance with BECo" Procedure TP 84-258. The overlay was examined and found to be acceptable. The overlay was designed with'the conservative assumptions that the indication is fully circumferential and extends through wall.
The N9A-1 weld overlay was re-examined during RF0 #7. The results indicate that the flaw has not propagated into the weld overlay. The ultrasonic test.
results also provided the following: (a) multiple indications in an 8" circumferential direction, (b) 0.55" maximum through wall dimension and (c) 0.65" original wall thickness.
l t
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9-                     _
_Page No.        K1 05/25/89 Table 3' Inspection Schedules EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE ICSCC  System     Weld Number   z     Diameter,            Configuration        RF06 RF07 FLAW RF08 RF09 Category IGSCC A CS           14 A-10A                   10 IN.        VALVE TO PIPE         6 IGSCC A CS           14 A-3'                    10 IN.        REDUCER TO PIPE       6 IGSCC A~    CS        14 B-10A                   10 IN.        VALVE TO P!PE         6 ICSCC A CS            14-B 3                     10 IN.        REDUCER TO PIPE       6     7 IGSCC A CS           14 A-2                     10 IN.        REDUCER TO SAFE END
                                                     !GSCC A CS           14-B-2                     10 IN.        OEDUCER TO SAFE END .
                                                     !GSCC A CS .         14R A-11                   10 IN.        PIPE TO VALVE.
ICSCC A CS .         14R-A 11A                  10 IN.        P!PE TO PIPE                         8 IGSCC A CS           14R A 12                   10 IN.        ELBOW TO PIPE IGSCC A'   CS        14R-A 13                   10 IN.        VALVE TO ELBOW IGSCC A=   CS .     -14R A 14                   10 IN.        PIPE TO VALVE-l                                                    IGSCC A CS           14R-A 15                   10 IN.        ELBOW TO PIPE
                                                !IGSCC A CS             .14R B 11                    10 IN.        PIPE TO VALVE ICSCC A CS '         14R-B 12                   10 IN.        ELBOW TO PIPE IGSCC A ' CS .        14R-B 1                    10 IN.        VALVE TO ELBOW ICSCC A . CS '       14R-B 14                   10 IN.        PIPE TO VALVE' IGSCC A'   CS '      14R ' 15                   10 IN.        ELBOW TO PIPE                              9
                                                 ; IGSCC A ' CS           14R B 21                   10 IN.        VALVE TO PIPE IGSCC A DECIRC       2R HA-1                    22 IN.        HEADER TO BEND ICSCC A     RECIRC'   2R-HA 21                   22 IN.        CROSS TO HEADER IGSCC A ' RECIRC   .2R-HA 3                     22 IN.        CROSS TO HEADER ICSCC A RECIRC        2R-HA 4                    22 IN.        HEADER TO BEND                             9 IGSCC A'   RECIRC    2R-N18 10                  28 IN.        ELBOW TO PUMP IGSCC A    RECIRC-   2R-N18-11                  28 IN.        PUMP TO PIPE IGSCC A .RECIRC      2R-N18-12                  28 IN.        PIPE TO VALVE-IGSCC A-   RECIRC    2R N18-13                  28 IN.        VALVE To ELBOW IGSCC A-   RECIRC    2R-N18-14                  28 IN.        ELBOW TO P!PE ICSCC A-   RECIRC    2R-N18-15                  28 IN.        PIPE TO TEE / CROSS ICSCC A 9ECIRC       2R-N1B 2                   28 IN.        SAFE END TO ELBOW IGSCC A RECIRC       2R-N1B 3                   28 IN.        ELBOW TO PIPE IGSCC A RECIRC       2R-N18 4                   28 IN.        PIPE TO TEE                          8 IGSCC A 'RECIRC      2R-N18 5                   28 IN.        TEE TO PIPE ICSCC A RECIRC       2R N18-6                   28 IN.        PIPE TO PIPE IGSCC A RECIRC     '2R*N18-7                    28 IN.        PIPE TO ELBOW IGSCC A RECIRC       2R-N18-8                   28 IN.        ELBOW TO VALVE              7 IGSCC A RECIRC        2R-N18-9                   28 IN.        VALVE TO ELBOW              7 IGSCC A RECIRC       2R-N2A-2                   12 IN.        P!PE TO SAFE END IGSCC A RECIRC       2R N2A-3                   12 IN.        COMPOUND BEND TO PIPE                      9 ICSCC A RECIRC       2R N28-2                   12 IN.        P!PE TO SAFE END IGSCC A RECIRC       2R N28 3                   12 IN.        HEADER TO PIPE IGSCC'A RECIRC       2R N2C 2                   12 IN.        PIPE TO SAFE END IGSCC A REclRC        2R N2C 3                   12 IN.        CROSS TO PIPE ICSCC A RECIRC       2R-N2D-2                   12 IN.        PIPE TO SAFE END IGSCC A RECIRC       2R N2D-3                   12 IN.        HEADER TO PIPE IGSCC A REclRC       2R N2E-2                   12 IN.        PIPE TO SAFE EUD IGSCC A 'RECIRC      2R N2E-3                   12 IN.        COMPOUND BEND TO PIPE IGSCC A RECIRC       2R HB-1                    22 IN.        HEADER TO BEND
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _ _ _ . _ _                   ._                                                                                                      I

I 3
             'j R'                           Pope No.                                '2 05/25/89 Table 3.
Inspection Schedules senses =====s sessassemassus============s      ============='
                               ~
1GSCC . System,                                           ~ Weld Number      Diameter.           Configuration          RF06 RF07 FLAW RF08 RF09 Category .i.
IGSCC A 'RECIRC                                                 2R-HB 2                22 IN.         CROSS TO HEADER
                            - IGSCC A: RECIRC'-                                                2R MB-3                22 IN.'        CROSS TO HEADER e' IGSCC A RECIRC-                                                   2R-HB-4                22 IN.         HEADER TO BEND ICSCC A RECIRC                                                  2R-N1A 10              28 IN.         PIPE TO VALVE-               7 ICSCC A' RECIRC'                                                2R N1A-11              28 IN.       ' VALVE TO ELBOW-IGSCC A RECIRC                                                  2R-N1A 12              28 JN.         ELBOW TO PIPE
                             'ICSCC A- RECIRC'                                                 2R-N1A 13              28 IN.         PIPE TO TEE
                            ' IGSCC A RECIRC                                               -2R N1A*14               '28 IN.          TEE TO PIPE -
IGSCC A'                              RECIRC                    2R N1A-15              28 IN.         PIPE TO CROSS IGSCC A ,. RECIRC -                                             2R-N1A-2               28 IN.         PIPE TO SAFE END
                           - IGSCC A''RECIRC;                                              -2R-N1A*3                 .28 IM.         ELBOW TO PIPE IGSCC A-                              RECIRC,                   2R-N1A 4               28 IN.         PlPE TO PIPE                                9
: ICSCC A RECIRC                                                   2R NIA-5               28 IN.         PIPE TO ELBOW
                           ' IGSCC A,.                               RECIRC                    2R-N1A 6               28 IN.         ELBOW TO VALVE
                            - !GSCC A.                               RECIRC                    2R N1A 7               28 IN.         VALVE TO ELBOW k                           ICSCC A IRECIRC                                             - 2R N1A 8                 28 IN.         ELBOW TO PtMP E                        ICSCC AE RECIRC                                                 2R-N1A 9'              28 IN.         PUMP M PIPE                  7 IGSCC A                               RECIRC'                 '2R-N2F 2                12 IN.         PIPE TO SAFE END
   ^
                            ' IGSCC A 'RECIRC.                                                 2R-N2F 3               12 IN.         COMPOUND BEND TO PIPE
                           - IGSCC A RECIRC                                                <2R N2G 2                  12 IN.         PIPE TO SAFE END IGSCC Al RECIRC                                                 2R-N2G-3              -12 IN.         HEADER TO PIPE-
                 ,             IGSCC A .RECIRC                                                 2R N2H 2-              12 IN.         PIPE TO SAFE END.
                              -!GSCC A'                              RECIRC                    2R-N2H 3               12 IN.         CROSS TO PIPE                          8 IGSCC A-                              RECIRC.                   2R N2J 2               12 IN.         PIPE"'O SAFE END IGSCC A'- 'RECIRC                                            '2R N2J 3                 12 IN.         HEADEi TO PIPE ICSCC A RECIRC'                                                 2R-N2K-2               12 IN.         PIPE TO SAFE END IGSCC A-                              RECIRC                    2R N2K 3               12 IN.         COMPOUND BEND TO PIPE IGSCC A RECIRC                                                  2R BPA-1               4 IN.          BR CONN TO P!PE ICSCC A RECIRC                                                  2R N1B 9BC-1           28 IN.         BR CONN TO ELBOW                                      ]
IGSCC A-                             RECIRC                    2R N18 9BC-2           28 IN.         BR CONN TO ELBOW                            9         l IGSCC A-                              RECIRC'                   2R BP 1A               4 IN.          BR CONN TO PIPE
                           ' IGSCC A RECIRC                                                    2R-N1A-7BC 1           28 IN.         BR CONN TO ELBOW                                     -i
                            . IGSCC A                                RECIRC-                   2R N1A 7BC-2           28 IN.         BR CONN TO ELBOW
                                !GSCC A                             .RHR'                      10R IA-1               18 IN.         PIPE TO TEE
                                !GSCC A'                             RHR                    '10R .IA 10               18 IN.         PIPE TO ELBOW ICSCC A RHR                                                     10R IA-11              18 IN.         ELBOW TO PIPE ICSCC A : RHR                                                   10R IA-1A              18 IN.         PIPE TO PIPE IGSCC A RHR                                                    10R 1A-2               18 IN.         ELBOW TO PIPE ICSCC A RHR -                                                   10R-IA-3               18 IN.         P!PE.TO ELBOW ICSCC A-                              RHR                       1DR-IA 4               18 IN.         ELBOW TO PIPE                                         1 IGSCC A RHR                                                     10R 1A 5               18 IN.         VALVE TO ELBOW                         8 ICSCC A RNR                                                     10R-IA 6               18 IN.         PIPE TO VALVE IGSCC A                               RHR-                     '10R IA 7               18 IN.         VALVE TO PIPE
                             .!GSCC A RHR                                                      10R-IA B               18 IN.         PIPE TO VALVE IGSCC A RHR                                                     10R IA-9               18 IN.         ELBOW TO PIPE IGSCC A RHR                                                     10R IB 1               18 IN.         PIPE TO TEE IGSCC A RHR                                                     10R IB 10-             18 IN.         P!PE TO ELBOW l
u___m            m_m__m_ . . _ _ _ . _ _ . _ _ . __       ___.m.. __-_ __

r f.
    , 's ~                                                         .
Page No.      ,3'
* 05/25/89-Table 3 Inspection Schedules 333333E33333333333333E3333333333333333333333333333333r,E IGSCC     System                             Weld Number.              Diameter                   Configuration     RF06 RF07 FLAW RF08 RF09 -
Category 1GSCC A . RHR                                 10R-IB-11                      .18 IN.              ELBOW TO PIPE IGSCC A RHR                                   10R-IB-14                       18 IN.              PIPE 10 FLUED HEAD       7 ICSCC A - RHR                                 10R IB-15                       18 ]N.              ELBOW TO PIPE
        ,IGSCC A RHR                                     10R-!B 16R                      18 IN.'             VALVE TO ELBOW IGSCC A RHR                                   10R-IB 2                        18 IN.              ELBOW TO PIPE
        -IGSCC A RHR                                     10R IB 3                        18 IN.              PIPE TO ELBOW IGSCC A RHR                                   10R-IB-4                       :18 IN.              ELBOW TO PIPE IGSCC A RHR                                   10R-!B-5'                       18 IN.             -VALVE TO ELBOW           7 IGSCC A RHR                                   10R-1B 6                        18 IN.              PIPE TO VALVE ICSCC A RHR                                   10R IB-7                        18 IN.              VALVE TO PIPE IGSCC A RHR                                   10R IB 8                        18 IN.              P!PE TO VALVE IGSCC A RHR                                   10R-1B-9                        18 IN.              ELBOW TO PIPE                                        9
         .lGSCC A RHR                                    10R 0-1                         20 IN.              TEE TO 45 ELBOW                                      9 ICSCC A RHR                                   10R-0 10                        20 IN.              PIPE TO PIPE IGSCC A RHR                                   10R 0 11                        20 IN.              PIPE TO ELBOW IGSCC A RHR                                   10R-0-12                        20 IN.              ELBOW TO VALVE IGSCC A RHR                                   10R-0-13                        20 IN.              VALVE TO PIPE IGSCC A RHR                                   10R-0-14                        20 ]N.              PIPE TO PIPE                              8 IGSCC A-    RHR                               10R-0-2                         20 IN.              45 ELBOW TO PIPE ICSCC A RHR                                   10R-0-3                       -20 IN.               PIPE TO ELBOW
          .!GSCC A RHR                                   10R-0 4                         20 IN.              ELBOW TO PIPE IGSCC A RHR                                   10R-0-5                         20 IN.              PIPE TO 45 ELBOW IGSCC A RHR                                   10R-0-6                         20 IN.              45 ELBOW TO P!PE IGSCC A RHR                                   10R-0-7                         20 IN.              PIPE TO VALVE            7
           !GSCC A RHR                                   10R 0-8                         20 IN.              VALVE TO ELBOW           7 IGSCC A RHR                                   10R 0-9                         20 IN.              ELBOW TO PIPE
         .IGSCC A RPV                                    14-A 1                          12 IN.              SAFE END TO N0ZZLE  6    7 IGSCC A RPV                                   14 B-1                          12 IN.              SAFE END TO N0ZZLE  6                     8 IGSCC A RPV                                  2R N1A-1                        28 IN.              N0ZZLE TO SAFE END       7 1GSCC A RWCU                                 12R 0-10                        6 IN.               PIPL TO VALVE IGSCC A RWCU                                 12R 0-11                        6 IN.               VALVE T:0 PIPE                                        9 1CSCC A-    RWCU                              12R 0 12                        6 IN.               PIPE TO ELBOW
           ]GSCC A RWCU                                  12R-0 13                        6 IN.               ELBOW TO PIPE IGSCC A 'RWCU                                 12R-0-14                        6 IN.               PIPE TO 45 ELBOW IGSCC A - RWCU                               12R-0-15                        6 IN.               45 ELBOW TO PIPE IGSCC A RWCU                                 12R-0-16                        6 IN.               PIPE TO ELBOW IGSCC A RWCU                                  12R-0-17                        6 IN.               ELBOW TO PIPE ICSCC A RWCU                                  12R-0-18                        6 IN.               PIPE TO ELBOW ICSCC A RWCU                                 12R-0-19                        6 IN.                ELBOW TO PIPE IGSCC A 'RWCU                                 12R 0-19A                       6 IN.               PIPE TO ELBOW
        'IGSCC A       RWCU-                             12R-0 1A                        6 IN.                SWEEPOLET TO ELBOW                       8 IGSCC A RWCU                                  12R 0-2                         6 IN.               45 ELBOW TO PIPE ICSCC A RWCU                                  12R-0 20                        6 IN.               ELBOW TO PIPE ICSCC A RWCU                                  12R-0 21                        6 IN.               PIPE TO ELBOW
           !GSCC A RWCU                                  12R-0 22                        6 IN.               ELBOW TO PIPE IGSCC A RWCU                                  12R-0-22A                       6 IN.               P!PE TO ELBOW 1GSCC A RWCU                                  12R-0 3                         6 IN.               PIPE TO 45 EtBOW

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30                                                      .                                                                                                                                      !
            .'Page No.                   4                                                                                                                                                     .j 05/25/89
   ,,                                                                       ~ Table 3                                                                                                           j
                                                                             .                       .                                                                                         .i Inspection Schedules                                                                                                      ;
                                                   ======ssassss=====s ss======================                                        asssanssa                                                 j
                 ; IGSCC              System     .Weld Number     , Diameter                     Configuration                                   RF06 RF07 FLAW RF08 RF09 Category IGSCC A RWCU                 12R-0-4                 6 IN.                 .45 ELBOW TO PIPE IGSCC A RWCU -               12R-0                6 IN.                   PIPE TO VALVE IGSCC A RWCU                 12R-0-6                 6 IN.                   VALVE TO ELBCW IGSCC A RWCU                 12R-0 7                 6 IN.                 . ELBOW TO PIPE ICSCC A RWCU                 12R-0-8                 6 IN.                   PIPE TO ELBOW IGSCC A RWCU                 12R-0-9                 6 IN.                   ELBOW TO PIPE IGSCC A RWCU                 12R-0 1                 6 IN.                   PIPE TO SWEEP-0-LET IGSCC D CS                   14 A 17'                10 IN.                  PIPE TO PENETRATION                              6-                                 8 IGSCC D.           CS -      14-A-18                 10 IN.                  PIPE TO PIPE                                     6                                  8 IGSCC D CS                   14-A 19                 10 IN.                  VALVE TO PIPE                                    6                                  8 1CSCC D CS                   14-B-17                 10 IN.                  PIPE TO PENETRATION                              6    7                                 9 IGSCC D CS                  14 B-18                 10 IN.                  ELBOW TO PIPE                                    6    7                                 9'
             -IGSCC D CS .                      14-B                10 IN.                  PIPE TO ELBOW                                    6    7                                 9 IGSCC D'           CS        14-B-20                 10 IN.                  PIPE TO PIPE                                     6-   7                                 9 l                  IGSCC D CS                   14R-A-16               '10 IN.                  PENETRATION TO ELBOW                                                                8 IGSCC D CS                   ,14R*B 16               10 IN.                  PENETRATION TO ELBOW                                                                8 IGSCC D CS                   14R B 21A               10 IN.                  PIPE TO PIPE-                                                                       8 IGSCC D            RHR-   '10-HS-23                  4 IN.                   PIPE TO ELBOW                                    6                                  8 IGSCC D RHR                 10-IA-14                18 IN.                  PIPE TO FLUED HEAD                                                                  8-
                  .lGSCC D RHR                  10 IA-15                18 IN.                  VALVE TO PIPE                                                                       8 IGSCC D           RHR'      10R-1A-12               18 IN.                  PENETRATION TO ELBOW                                                                8 IGSCC D RHR                 10R-!B-12               18 IN.                  PENETRATION TO ELBOW                                  7                                 9 IGSCC D RHR                 10-HS-1                 6 IN.                   REDUCER TO FLANGF                                6                                  8 IGSCC D RHR                 10-HS 10                4 IN.                   PIPE TO ELBOW                                    6    7                                 9 IGSCC D RHR                 10-HS-11                4 IN.                   PIPE TO PIPE                                     6    7                                 9 IGSCC D RHR                 10-HS 12                4 IN.                   FLANGE TO PIPE                                   6    7                                 9 IGSCC D RHR                 10 HS-13                4 IN.                   PIPE TO FLANGE                                   6                                      9 IGSCC D RHR                 10 HS-14                4 IN.                   ELBOW TO PIPE                                    6                                      9 ICSCC D           RHP.      10 HS 15                4 IN.                   PIPE TO ELBOW                                    6                                  8 IGSCC D RHR                 10 HS-16                4 IN.                   ELBOW TO PIPE                                    6                                  8 ICSCC D RHR                 10 HS-17                4 IN.                   PIPE TO ELBOW                                    6                                      9 IGSCC D RHR                 10-HS-18                4 IN.                   ELBOW TO PIPE                                    6                                  8 IGSCC D RHR                 10 HS 19                4 IN.                   VALVE TO ELBOW                                   6                                  8 IGSCC D RHR                 10-HS-2                 4 ]N.                   ELBOW TO REDUCER                                 6                                      9 IGSCC D RHR                 10-HS 20                4 !N.                   PIPE TO VALVE                                    6                                   8 IGSCC D RHR                 10 HS-21                4 IN.                   VALVE TO PIPE                                    6                                      9 IGSCC D RHR                 10-HS-22                4 IN.                   ELBOW TO VALVE                                   6                                      9 IGSCC D RNR                 10-HS-3                 4 IN.                   PIPE TO ELBOW                                    6                                   8 IGSCC D KHR                 10+HS-4                 4 IN.                   ELBOW TO PIPE                                    6                                      9 IGSCC D RHR                10-HS-5                 4 IN.                   PIPE TO ELBOW                                    6                                   8 IGSCC D RHR                10 HS-6                 4 IN.                   PIPE TO PIPE                                     6                                      9
                     !GSCC D-         RHR'      10-HS 7                 4 IN.                   ELBOW TO PIPE                                    6                                   8 IGSCC D RHR                10 HS 8                 4 IN.                   PIPE TO ELBOW                                    6    7                                 9 ICSCC D RHR                10-HS-9                 4 IN.                   ELBOW TO PIPE                                    6    7                                 9 IGSCC D RPV                 2R-N18 1                28 IN.                  N0ZZLE TO SAFE END                                                                   8 IGSCC D          RPV'      2R-N2A 1                12 IN.                  SAFE END TO N0ZZLE                                    7                                 9 IGSCC D RPV                2R N2B 1                12 IN.                  SAFE END TO N0ZZLE                                    7                                 9

33               .
w; ,,                                         ,
               'Aage No.         '5 :
05/25/89 Table 3 Inspection Schedules
                                            == ssassassansssssamassassamassess==sess ...... ssss===
IGSCC ' System         Weld Number      Diameter                 ' Configuration-          RF06 RF07 FLAW'RF06 RF09 Category IGSCC D RPV           2R*N2C 1              12 IN.                 SAFE END TO N0ZZLE -                                                                8 ICSCC D 'RPV          2R-N2D-1              12 IN.              ' SAFE END TO N0ZZLE                                                                   8
               .!GSCC D       RPV.       2R-N2E 1              12 IN.                 SAFE END TO N0ZZLE                                                                  8
                -ICSCC D RPV             2R N2F-1              12 IN.                 SAFE END TO N0ZZLE                                                                  8 IGSCC D RPV           2R N2G-1              12 IN.                 SAFE END TO N0ZZLE -                                                                   9
                ;1GSCC D .RPV            2R N2H 1              12 IN.                 SAFE END TO N0ZZLE                                                                     9-IGSCC D RPV           2R-N2J 1              12 IN.                 SAFE END TQ'N0ZZLE                                                                  8 IGSCC D RPV           2R N2K-1              12 IN.                 SAFE END TO N0ZZLE                                                                     9 i              IGSCC D ~ RPV         RPV N9B-1             4 IW.                  N0ZZLE TO SAFE END      6                    7                                         9 IGSCC D ' RWCU.        12-1 16 '            6 IN.                  REDUCER TO PIPE                             7                                          9.
               'ICSCC D RWCU              12-0-24              6 IN.                  P!PE TO PENETRATION     6                                                              9 IGSCC D RWCU           12 0-25              6 IN.                  PIPE TO P!PE            6                                                              9 j                  IGSCC D -RWCU          1^ 0-26              6 IN.                  PIPE TO BEND-            6                                                             9'
!                  ICSCC D RWCU           12 0-27              6 IN.                  BEND TO PIPE         .6                                                                9 IGSCC D RWCU           12-0 28              6 IN.                  PIPE TO ELBOW            6                                                          8 IGSCC D RWCU           12-0-29.             6 Ih.                  ELBOW TO PIPE            6                   7'                                     8 ICSCC D ,RWCU          12-0-30              6 IN.                  PIPE TO ELBOW            6                   7                                      8 IGSCC D RWCU           12-0-31              6 IN.                  ELBOW TO PIPE            6                  7                                       8' IGSCC D RWCU           12-0-32              6 IN.                  PIPE TO VALVE            6                                                          8
               'IGSCC D PWCU              12R-0 23             6 IN.                  ELBOW TG PENETRATION                                                                8 IGSCC D RWCU           12117-               4 IN.                  P!PE TO REDUCER          6                                                          8 IGSCC D RWCU           12-I 18              4 IN.                  ELBOW TO PIPE            6                                                          8 IGSCC D RWCU           12-1 19              4 1N.                  PIPE TO ELBOW            6                                                     ~8~
IGSCC D RWCU           12 1-21              4 IN.                  PIPE TO ELBOW            6                                                          8
               'IGSCC D       RWCU-       12-1 23              4 IN.                  PIPE TO ELBOW            6                                                          8 IGSCC D RWCU           12-1-23A             4 IN.                  PIPE TO PIPE             6                                                             9 IGSCC D ~ RWCU         12-1-24              4 IN.                  ELBOW TO P!PE            6                                                             9 IGSCC D RWCU           12125                4 IN.                  PIPE TO ELBOW            6                                                             9 IGSCC D RWCU           12-1-25A             4 IN.                  P!PE 10 PIPE             6                                                             9
: ICSCC D - RWCU           12 1-26'             4 IN,                  ELBOW TO PIPE            6                                                             9 IGSCC D RWCU           12-1-27              4 JN.                  PIPE TO ELBOW            6                                                             9 IGSCC D .RWCU          12-I-28              4 IN.                  ELBOW TO PIPE            6                                                          8 IGSCC D RWCU           12-1-29              4 JN.                  PIPE TO ELBOW            6                                                          8 IGSCC D RWCU           12-1-30              4 IN.                  ELBOW 10 PIPE            6                   7                                      8 IGSCC D RWCU           12-1-31              4 IN.                  PIPE TO ELBOW            6                   7                                      8 IGSCC D 'RWCU          12-1-32              4 IN.                  ELBOW TO PIPE            6                                                          8
               '1GSCC D RWCU              12-1-33              4 IN.                  PIPE TO ELBOW            6                                                             9 IGSCC D RWCU           12-1-34              4 IN.                  ELBOW TO PIPE            6                   7                                         9 IGSCC D hitCU          12-1-35              4 IN.                  PIPE TO ELBOW            6                   7                                         9 ICSCC D RWCU           12-1-36              4 IN.                  VALVE TO PIPE            6                   7                                         9 1GSCC E RPV            RPV-N9A-1            4 IN.                  N0ZZLE TO SAFE END       6                   7                   YES 8 ICSCC G    CS-        DB/DC-14-3002 5-1     10 IN.                 ELBOW TO PIPE                                                                       8 IGSCC G CS            DC-14 F31             10 IN.                 P!PE TO VALVE                                                                       8 IGSCC G CS            DB/DC 14 3001 4-1     10 IN.                 PIPE TO PIPE                                                                        8 IGSCC G CS            DC 14-F1              10 IN.                 PIPE TO VALVE                                                                       8 ICSCC G RHR            10-IA-13A            18 IN.                 PENETRATION TO FLUED HEAD

h
     *i                          .
lageNo.       6 05/25/89                                                                                                                  1 Table 3 Inspection Schedules
                            ===ss===sses====sames===ssammasassamassassessmas...asse
          !GSCC-   System  Weld Number      Diameter          Configuration         RF06 RF07 FLAW RF08 RF09 Category IGSCC G RHR      10-IB 13A            18 IN.        PENETRATION TO FLUED HEAD 1GSCC G RhR      DB/DC-10 3002-3-3    18 IN.        PIPE TO PIPE                          8 IGSCC G RHR      DC 10 F9             18 IN.        PIPE TO VALVE                         8 IGSCC G RHR      DC 10 F10R           18 IN.        PIPE TO VALVE                         8 IGSCC G 'RHR     DB/DC-10 3001-2 1    18 IN.        ELBOW TO PIPE                         8 IGSCC C RPV      3-I-1                6 IN          N0ZZLE TO CAP                         8 IGSCC G RWCU     12-1 20              4 IN.         ELBOW TO PIPE IGSCC G RWCU     12-I 22              4 IN.         ELBOW TO PIPE 4

4  RAI ITEM 3 Holds Covered in Licensee Submittal Generic Letter 88-01 (on page 2) states:
                                    "This Generic Letter applies to all BWR piping made of austenitic stainless steel that is four inches or larger in nominal diameter and contains reactor coolant at a temperature above 200*F during power operation regardless of Code classification. It also applies to reactor vessel attachments and appurtenances such as jet pump instrumentation penetration assemblies and head spray and vent components."             i Here any welds that fall within this defined scope excluded from the licensee submittal (for example, welds in the RHCU outboard of the isolation valves)? If previously excluded, please list identity of such welds and plans for mitigation and inspections in Tables 2 and 3 or.
provide alternative proposal. If IGSCC susceptible welds were excluded from the licensee submittal based on temperature considerations please identify the welds and describe in detail the method of temperature measurements.
Resoonse to RAI Item 3 No welds beyond Code classification (i.e. beyond the isolation valves) are listed on either Table 2 cr Table 3.
l
                           ~ Boston Edison considers this Generic Letter recommendation to be an expansion of the scope of IGSCC rugmented weld inspections beyond ASME, Code classification piping (for example, Reactor Water Cleanup piping outboard of the isolation valves).
l                          The RHCU is a non-safety related system that is designed to be automatically l
isolated if a pipe break downstream of the isolation valv6 were to occur. Two motor-operated isolation valves, one on either side of the primary containment, are automatically closed by signals from instrumentation installed to detect breaks in the RHCU system, among other isolation signals. Pipe breaks or leaks in the RHCU room would be detected by a high temperature indication, a high flow indication or a combination of both.
Therefore, by design, a severe break in the RWCU piping would trigger the automatic isolation from either high temperature in the RHCU room or from a      ;
high flow indication in the RHCU piping, alerting operators to the break. In     i addition, since IGSCC is a slow deterioration process, any leak in piping susceptible to it would develop slowly, allowing time for operators to detect the leak, isolate the system, and repair the leak.
Also, weld inspections of this piping would be contrary to good ALARA practice due to the high personnel exposure involved in the performance of these inspections. Fifty eight (58) Code related RHCU welds have been identified in Tables 2 and 3. Adding non-Code related welds to this list would create a considerable increase in exposure without a commensurate gain in reliability of the systems.
A review of radiation exposure data by our ALARATroup indicates that the radiation exposure recorded for 10 welds examined for IGSCC in the RHCU room during RF0 7 was 10.42 Rem. This figure includes time spent on scaffold erection and removal, insulation (asbestos) removal and reinsulating, weld preparation, and the actual ISI exam. Therefore, the exposure for one weld i
      ---________n__.        __        -_

                 ~ *' o           exam is about 1.04 Rem. Using this number as an average, if we are required to inspect the approximately 55 non-code welds, the resulting exposure would be
?
57.2 Rem for the first outage (100% inspection) and 28.6 Re'n per outage (50%
inspection) for the non-code welds every outage thereafter.
Of the 58 code related welds in the RHCU system,14 are listed as.being in the Reactor Water Clean Up room. These 14 welds are upstream of the isolation valves and are categorized as IGSCC class D meaning they are 100% inspected every other outage (50% each outage). Due to their close proximity to the non-code piping welds in the RHCU system, they are subjected to an IGSCC environment similar to the non-code class. piping, i.e, reactor coolant greater than 200*F, IGSCC sensitive piping, etc. IGSCC augmented inspections of these welds have so far been negative.
The large bore process piping (4 inches nominal diameter and larger) in the RHCU system is installed as " Nuclear" service class per the Piping Design Specification (M-300) for Pilgrim. This means the entire piping loop was inspected to the nuclear non-destructive examination (NDE) requirements specified in M-300. He therefore consider the entire RHCU system piping as being represented by the code related welds now being examined by the IGSCC augmented inspection program. By considering the code related welds as being a
     .'                           representative sample of the welds in the entire RHCU system we have high confidence (greater than 90%) that there is no unacceptable level of weld defects (i.e., weld defects are less than 5%) in the RHCU system, including the non-code class welds.
a 1
As an alternative to conducting IGSCC exams of the RHCU piping welds that are downstream of the isolation valves, we propose the following. If, during our weld inspections of the Coo related RHCU piping, we find any indication of
                            '     IGSCC, we will apply the sample expansion criteria of.NUREG 0313, Revision 2,   '
as modified in our response to GL 88-01, to the code related piping and include the non-code related welds in the sample scope. This proposal would keep radiation exposure ALARA while providing added assurance of identifying IGSCC related cracking in the non-code RHCU piping.
As is noted in our original GL 88-01 response, we intend to use Hydrogen Water Chemistry to mitigate IGSCC propagation in addition to keeping the reactor water within EPRI water chemistry guidelines.
No IGSCC susceptible welds were excluded from our submittal based on temperature considerations. The weld database was formulated using the design temperature from the Piping Design Specification (M300) for Pilgrim.
Additionally, the process diagrams were used as a cross check on the design temperature. Plant experience has indicated that the actual service temperatures are much lower and in some cases could prove to be lower than 200*F. However, the more conservative use of the design temperature specification has been selected.
- _ - _ - _ _ _ _ _ _ _ . _ .                                                                                     I

RAI' ITEM 4 Helds That Are Not UT Insoectable                                                                        f 1
Generic Letter 88-01 (in Table 1) states: "Helds that are not UT inspectable should be replaced, " sleeved", or local leak detection-applied. RT examination or visual inspection for leakage may also be considered."
Does the licensee submittal include discussions and plans for:                                                I a) - All welds that are inaccessible for UT inspections?                                                     i b) All welds that are only partially accessible for UT inspection?-
c) Helds that cannot be UT inspected because of geometrical constraints or other reasons.
If not, please list these welds and plans for mitigation / inspection.
Response to RAI ITEM 4 On page 4 of attachment A in our response to Generic Letter 88-01, dated August 4,1988, we supplied.the following information regarding our plans concerning:
a) Inaccessible welds.
l                                         b) Partially inaccessible welds, and c) Helds not UT inspected because of geometric constraints or other reasons.
4   Four Category G piping welds have not been inspected due to their inaccessibility to UT or RT inspection methods. Two welds, 12-I-20 and 12-I-22, will be monitored for leakage by daily plant operator tours. The remaining two welds,10-IA-13A and 10-IB-13B, are located within drywell penetrations. Held number 10-IB-13A is a Corrosion Resistant Clad weld but is inaccessible. Any leakage from these welds would be monitored by the Drywell Leakage Detection System.
In addition to the above information from our Generic Letter 88-01 submittal we provide the following plans for mitigation / inspection. Helds that can be examined for 90'/. of their length from at least one side are considered                                             '
accessible for UT examination. Helds that do not meet this criteria shall be replaced, sleeved, have local leak detection applied, be radiographically examined, or be visually inspected for leaks.
                                                                                                                                                         )
l 1
I l
l I

         ..,                                                                        TABLE 4 (1 page) o                                                                                                                             i Licensee Positions on leakaae Detection                             '
Already   TS will be   Alternate Contained    Changed    Position            i Position                                  in TS    to Include   Prooosed            i
: 1. Conforms with Position C of Regulatory                                Yes (a)
Guide 1.45                                                                                ,
: 2. Plant shutdown should be initiated                                                       1 when:
(a) within any period of 24 hours                         Yes (b) or less, an increase is indicated in the rate of                                                       4 unidentified leakage in excess                                                  '
of 2 gpm, or (b)     the total unidentified leakage       Yes attains a rate of 5 gpm.
: 3. Leakage monitored at four hour                             Yes (c)                       l intervals or less.
1
: 4. Unidentified leakage includes all             Yes except:
(a) Leakage into closed systems, or I
l                                                 (b) Leakage into the containment i
atmosphere from sources that are located, do not interfere with monitoring systems, or not from throughwall crack.
: 5. Provisions for shutdown within 24             Yes hours due to inoperable measurement instruments in plants with Category D, E, F, or G welds.
Note; (a) Regulatory Guide 1.45 is used as guidance when modifications are made to the Pilgrim leak detection systems however, it is not a part of the technical specifications.
(b) See Attachment A, page 5, of BECo response to GL 88-01, and proposed TS change, section 3.6.C.l.b, submitted in 1985 in response to GL 84-11.
(TAC #69153)
(c) In our {{letter dated|date=February 4, 1985|text=February 4,1985 letter}}, BECo requested a once per 8 hour monitoring interval as PNPS does not have a fixed pump interval on the drywell sump pumps. Also, the Pilgrim recirculation pipe replacement reduces the probability of the type of leaks from unidentified sources for which the detection systems are installed.
                                                                                                                                        -j

I*,                       .                                                                                                     I RESPONSE TO ATTACHMENT B REQUEST FOR ADDITMi4AL INFORMATION                                                              ,
PERTAINING TO PILGP.IM :.uCLEAR PONFR STATION ITEM 1 Inservice Inspection PrWram                                                                                       I Please note the following in preparation of the response to Attachment A: The licensee submittal states that seven-(20%) of the IGSCC Category A welds will be inspected. . In the attachment, however,148 IGSCC                                               -
Category welds are listed (excluding longitudinal seam welds which are                                          ;
outside of the scope of Generic Letter 88-01). Seven is 5% (not 20%) of                                        '
148. Please supply an explanation of this discrepancy.
Explanation of Item 1 Generic Letter 88-01 (NUREG 0313, Rev. 2) recommends that 25 percent of the IGSCC Category A welds be examined in a- ten year period. At Pilgrim, 25 percent (37 welds) of the total weld population (148 welds) will be examined in 10 years. Typically, five refueling outages will occur in 10 years, and 7 or 8
  ^t         Category A welds will be examined at each outage.
                                                                             . _ _ - _ - _ _ _ _ _ _ _ _ _ _}}