ML20134L302

From kanterella
Jump to navigation Jump to search
Advises of Minor Field Changes to Mods in Steam Generator Blowdown & Auxiliary Steam Sys High Energy Line Break Temp Monitoring Sys.Revised Sensor Locations Indicated on Encl. Completion of Mods Expected by 850930
ML20134L302
Person / Time
Site: Byron Constellation icon.png
Issue date: 08/23/1985
From: Ainger K
COMMONWEALTH EDISON CO.
To: Harold Denton
Office of Nuclear Reactor Regulation
References
0546K, 546K, NUDOCS 8509030187
Download: ML20134L302 (6)
v • d • e


Text

_ - _ - - .

.f,

~

^ ' x ' Commonwealth Edison

) one First Nationti Plaza, Chicigo. Ilhnois

! -' ~J Address Reply to: Post Office Box 767 (y Chicago Illinois 60690 August 23, 1985 -

Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, DC 20555

Subject:

Byron Station Unit 1 Environmental Effects of High Energy Line Breaks NRC-Docket No. 50-454 Reference (a): August 2, 1985 letter from K. A.

Ainger to H. R. Denton

Dear Mr. Denton:

Reference (a) provided details of the design of the temperature monitoring system to detect and isolate high energy line breaks in the Steam Generator Blowdown (SD) and Auxiliary Steam (AS) systems. This is to inform you of minor field changes to the modifications described in reference (a) and to advise you of the status of.the installation of these modifications for Byron Unit 1.

~

Equipment interference problems have prevented the installation of some of the temperature sensors in locations as originally described in reference (a).- The revised locations of these sensors are shown on the attached figures. The relocation of these sensors does not reduce their effectiveness to promptly detect the adverse environmental conditions associated with high energy line breaks in the SD and AS systems.

The installation of these modifications is near completion.

However, receipt of some of the temperature sensors was delayed beyond originally scheduled delivery dates from the vendor. This delay along with the time required to perform the functional testing of the equipment may extend completion of the modification beyond August 31, 1985. Every available hour is being worked to complete the modifications and manpower has been increased to help compensate for delays. We expect to have the

modifications complete no later than September 30, 1985.

I 8509030187 850823 PDR ADOCK 05000454 p PDR

/

Y

=- .

A. :.

H. R. Denton August 23, 1985 We will continue to keep personnel posted at designated locations in the Auxiliary Building so that line breaks can be promptly detected and terminated manually before environnental conditions exceed predicted values.

Please direct any questions regarding this matter to this office.

One signed original and fifteen copies of this letter and attachment are provided for NRC review.

Very truly yours,

/ . .

K. A. Ainger Nuclear Licensing Administrator 1m Attachment cc: Byron Resident Inspector 0546K i'

i i

~

i i

- , . - , . . - . - - . _ . . , - . _ - , . . . . - -, , - . - . - - - . .- . . . . ~ _ . - - - . , . - _ . - . . - . . .

w T FIGURE.1C ,

STEAM GENERATOR BLOWDOWN SYSTEM HELB MONITORING h (UNIT 1 ) ~~~ -

73-6 h- .

l (1 SDO1EB 3) '(1 SDO1 E A 3) -

(1 SDO1 ED 3

  • 1SDO1EC 3)

OSDO1F 6) i  % / /  ;

I / t
            -1r-                                                                  ((             r                                                                                             ;

I . ;- - I 

         , 4.l*-                Ei Il
  • t1iI
02-k {, g. l
                                                                                          <   r
          . 66                  1111                                                  ,

d d iIil t ;bjo^j;k 

     ;       -          -     ^     -      -

A3OO 

             ,_,        [              .

A301 A304 ' ' ~ 3 I A302 A305 -- A303 

                                                   -                                       (1SDO1LA              14 h s                                    !

5 ETS .h  :, R ETS , g E!E ,, g 

                 .,      g                                                                                                     4-              -
            -)
             ?
                        .l.                                    '

TS M --gh J- 

                                                                                ,i                                       TS                               (1SD01LB             14) n       -

EE - l 

                                             ,,     ETS

_ j.I, *"*- 

                                                ,. gTS                 LEGEN D~.            P CA            FOR   l'dRES G

q BLOWDOWN - '

a. L * '

CONDENSER g {- . TEMPERATURE '. SENSOR 1SDO1A TUN NEL , ; AUX. HIGH ENE'RGY LINE BREAK NO. EL.364'- O~  ; ARM BLDG. 

                            ,                                          (           )LINE IDENTIFICATION                             _ _ _ _ _ _ _ _ _            _ _ _ _   _______i

l' FIGURE 2C . 

                                                                                                                                                                       -l  -

s AUX. STEAM SYSTEM RELB MONITORING (UNITS 1 &2) E 22 23 (AS TUNNEL AT COL M-23) 24 6'.- O . _ _ 21-3 _ , 

                                                  . .              i                                                   r                                                   !

g .' , Y s * .' ' 

                                                                                                                  .V . Y .- <'     id
                                                           ;'..,, t'.*.. -: ;
                                                              ,5
                                                                                                                  'a. .p,- g
                                                                                                                       . , ey .. .
                                                                                       '                  ~

n N 1 (O AS 33C - 6) $. 

                                                                                                                                              =                .

i 1 (O AS i 3OC -, 4) - 

                                                                                                                                                 ?                         l g

(OAS 03F -16) ll M i - i TS t 

            **Le?.       .
                                                                                           ,                                                                              i* .
           . t.' 9'    *
                    ..                                         : .* s a                             . ..    .
           . ., g %:~. -                                     r. .' r e i                                                  -
                 .-                                             ,. -( ,,

TS '. V 4 O ' BOTTOM TUNNEL ' 

         ,                                EL. 394'-O"                            A020                                                             $

n, , . i fd a 

                                                                                                  .J
                                                                                                  '/ , a    -

g 

                                                                                                                                                                        -{
i' $.s's6 f. v gli / =/ es.t';.

4 ci; p t ' # t.,'.'..*.- l AOO7 / f. 6 

                                                                                                                  ;At 5.' ig4-  s:,o"     <

s l l - j i j L ~ I l AO13 - ( 

                                             #P Gs LEGEND:                                     .
                                                                                                                                                       ~

SAME AS FIGURE iC ' i 

                                                                                                                                                               .        i i

I 

                  '~

J' 

                                                                            . FIGURE 2D                                                                                          ,

AUXILIARY STEAM SYSTEM HELB MONITORING (UNITS I&2) ' (RECYCLE Wh5TE EVAPORATOR ROOMS) i fAOO51 Q J $.? t?. 2 _ l Ct; 4 , I s *; n (OASF6AAY Y -- O SO3KB-6} m (OASO3.KA 6 (OASF6AB-Il@) 

                                                                          '                           c OASF5Ag3/4)                                                -  -

b ~p -: LEGEND (OASO3LA 4) rP j -- (OASO3LB-4 / 

                                                                   ;)

r- 0 SAME AS ( OAS35AB-2 i k_ y (OAS35AA-2) FIGURE IC (OAS35AO3h 

                                    ^^
                                                                                                                           ^        ^

AOO4 

                            ,u -      -u                            i                                              U-      --

N i 

                             \         ^5                  SUE UBE EVAP.                        .                        N            n. _-.                    SL8 TUBE EVAP.

OABO2DA - 

                                                                                                                                                          ~OABO2DB u                EVAR                                                                 u                           EVAP.

COND. 

                                        \\                          i                                                                            COND.

i

  • s u U ~ oi  ;
                                            \                                               %               f          -  --

w h (OAS 36 BA-O , kv 3/ i h v N ' OASF7AB 3/4) (OASF5AA3$- U , l IA0015 ' y% _ _ . - .__i _ __ _ 

                                                                                                            >                                  (OAS36AB-l )

g - 

                                              "                        J                                                 _         _

r _- -

  • AOO3 I LOAS O4BB-2[ .l
       -#                                                       3               >        i
                                                                                                                                             -(      36 w e   TS E        TS E x'x
                                                                                   =r:

ym* ,, 2-x m, 

                                                                                                                                                                              >    -J _t D

Iil l hoop l 

                                                                               \4          '

S TS ETS 

                                                                                                                                                                                        ~*'

t 

  *                   (OAS36C-18/                                                                               COASO4AA-2)
    - Is l kOASO4C-3)                                               ^                -

h - I 7- 6~

  • f i 7' 6~ ~

(OA596A-103 EL346'-O

FIGURE 2E . h . AUXILIARY STEAM SYSTEM HELB MONITORING (UNITS 1&2) AUXILIARY STEAM (RADWASTE EVAP. ROOMS) Q  ! . 7 3'- 6 * . f 1: 8

0 ' (OWXY9AB 20) .

~T . BTS E TS E TS - M TS E TS i ?>- 

                                             --f4--                                                                    -fh-                                                           >.

(OAS32AA 10 (OAS3 2 AB 10 (OAS29A 10) g' j N 2AO10 2AOO8 - 4- N VAPOR BODY t TANK OWXO7DC U 

  <                                                                                                         U                                                                         .

2AOO9 g 6 _~9 G_N,g c;n " 2A614 I k N X N h T  ; 3 VAPOR < VAPOR v 3 3 O qs BODY TANK v_ BODY TANK " O qs - 2A012 (0, OWXO7DA - 

                                                                                  '          X                                                     '

X OWXO7DB-[ 3 ' 2A623 x i* 

                              -Sh               O       ~
                                                                              -f    $IO                        'x                      Q                 g 2A606 T                                          3A604            !             .o/                   2A624        -
                                                                                                                                             /                                       l
                                                                                    /~                 2 A618 2A600     --
s. _a 2A615 - r._ .

4 - k 2A 605 - - l - [ 2A609 - . I , l. 2 A 619 ~ 3 ' I jh -2A622 - 2A601 -d i F- ---' 2A610 #- " ' '" 2A620 - s 

                                                                                                                                   ~T           --*

i  ! 2 A613 

                                                                                                                                                           ~
                                                                                                                                                                 ^

2A 602 - 2A 611 , e A 03 A612 [ PUMP 2AO11 f PUMP PUMP OWX31PC [ HEATING  ! ( HEATING . Q HEATING OWX31PA OWX31PB ELEMENT ELEMENT ELEMENT i OWXO6EA OWXO6DB ~OWXO6DC I (OWX113 AC 18 j 

                                      \-                                          \                                                                                    . . . .
                                                                                                        ~    *

(OWX113 AA 18 (OWX113 AB 18) . EMPERATURE SENSORS PROTECTING THESE AREAS i LEGEND EL 414'-O' ALSO PROTECT AREAS SHOWN  : SAME AS FIG.1C ON FIG. 2F (4Ol*-O T'  !}}

Retrieved from "https://kanterella.com/w/index.php?title=ML20134L302&oldid=3377844"