View source for 05000277/LER-1976-011, Telecopy LER 76-011/01P:on 760219,allowable Gross Activity Gaseous Release Rate Exceeded Tech Spec.Caused by Xenon Gases Released During Filter Demineralizer Backwash.No Immediate Corrective Action Possible

{{Adams
| number = ML20086F840
| issue date = 02/19/1976
| title = Telecopy LER 76-011/01P:on 760219,allowable Gross Activity Gaseous Release Rate Exceeded Tech Spec.Caused by Xenon Gases Released During Filter Demineralizer Backwash.No Immediate Corrective Action Possible
| author name = Ullrich W
| author affiliation = PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
| addressee name = Oreilly J
| addressee affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION I)
| docket = 05000277
| license number = 
| contact person = 
| document report number = LER-76-011-01P, LER-76-11-1P, NUDOCS 8401090581
| document type = LICENSEE EVENT REPORT (SEE ALSO AO RO), TEXT-SAFETY REPORT
| page count = 2
}}
{{LER
| Title = Telecopy LER 76-011/01P:on 760219,allowable Gross Activity Gaseous Release Rate Exceeded Tech Spec.Caused by Xenon Gases Released During Filter Demineralizer Backwash.No Immediate Corrective Action Possible
| Plant = 
| Reporting criterion = 
| Power level = 
| Mode = 
| Docket = 05000277
| LER year = 2076
| LER number = 11
| LER revision = 
| Event date = 
| Report date = 
| ENS = 
| abstract = 
}}

=text=
{{#Wiki_filter:-       -
G Qjevw
   ,                                                    m                         =.:
s . : . .: ;*.
es .                . . . . - . 6.
                                                                                                                                          .g.=                              . . .p =: . e. ;
a .e .
                                                                                                                                                                                                                                                                                     .1
                                                              )                                                                                   ...g                     . s...
r :..s   .
I
                                                                                                        ....      .           n....o. ..                  .sa..        a. ..%.e.        . .. ..                                                                                        l t
                                                                                                       ......gs                  . . . . t. .v .. .e . s.... g g l
r
                                                                                                                                 .        2.-                                                                                                                                          1 1
1
                                                                                                                                                                      . e T r '. i r *r*
4
                                                                                                                   .                                                                                     .y,                 .   ? '-                                                  l
         *=
v"-
V. . . r% e.3 .~ ' . -." ' .ts e. .* .*ys
         .                                                                    .                . . -8.. o.....-               . .
           *..*..s*.. s ... . ..r3 e.- . g                         .
                                                                             .s..
                                                                              .. . . .            g.. . . .c. . #.,.,         . . . .            .a....
Q.. , .:
           . .,...,i
                  . ...               .::. .. .... . . , ,          .e..,..
                                                                    ..... . =. . ...'l....                             . -
                                                                                                                                  ...                 ...-  .--.ae     ,..t                                                     /                             -
e*    .* . = s .,. f.                                                                                                                                                                                                ,y (g,
4 4           .                      .%' .. . a. ,.. p                                                                                                                                  ,
          .L. 4.      ;.         # :.                    ,,:                                                                                      *-                *
                   .             . .. ..                    ..3g                 r .,. .. . 3.
                                                                                 .                , . .     . g  . ,. . i. g                     .            m. ..                                                        .
          .,.,..,s-..  . . - .                                                                     .
                                                    .._. ..; .. e . t_ ._ g-                       _ .          J .; .,. . - .. . ;.4.._         ,       t. ..; .....p.    ; -        ..
           . . . e.4
               .         . -           .t    .    .
                                                        .D. .
                                                                        . .;* 4.4.a. . . . ... .                                *.
                                                                                                                           . . . s           y ..s. p. ., ,a.
                                                                                                                                                                                                               . ..        ..e...        .      .ga..   .      gS..
             .g . . g . y. . ..                     ,,,.2
                                                                             .t .           7.4.          ,. 4          ..,.3
                                                                                                                            .            9e .; .
* g
                                                                                                                                             . .                   ..                 .=. g
                                                                                                                                                                                                    .;   g .,,.y       . . . .             . .       g,...r.. ..
          *n          4      ay...O.
         ..e ,. C r e r. C e :
                                                                                      ., 3 e r. e *.
                                                                                                                     .s um t e r .                 : 5, =c v                  ~
                                                                                       .r    .. . . * ...                    c:                                                                                                                                                        \
t
                                                                                       . g > ..  .. [ n. g i.                   -2p. y .         4. .e .t .,. . .g . .s...               .t a. .ra. f a.,               . . .
                                                                                                                                                                                                                     ... .                  ~. '.          ~ -
l
: 2. e p. ,.,. ..
         .                            .v.        .
c .C. .._- ,.
          %..                   ..,.e                                                 :;
i e...           .. ..                         ..,,E...     ..                .e,              ..%ff. .. ;, ,
I
        ...ntc.   .              .
                                            .&..    .. u c         3..,.,.,...
A%. a. e : e .:. . e x ....., e. .. .s .. .y
                                                                       .,~
: u. .n. .a .. P. .t
                                                                                .           .                  -~- 3. g..a.  . s.o. ..% .. ..r.,.. ..                     .2,.           .* *         ,        *.*-
rs . . .. .. E .% .' ,.           .    .i n.     .,      ,
s g g g n.w. 3                              e.  '. e. c,.   .n o . q . a.. .r
                                                                                                                                                                          . 7 g a .v. .a . .
                                                                                                                                                                                                             . ., a. . o. ....:..                      .-     .
                                                                                                                                                                                                                                                                . . n,.      .       l
          . D r 3.. .:+ 3.-     .u                     .":' : v.. r , .)
                                                                                             , .s. .. .. .J v. - 4.
u..
r'.
J...                    1 5.              s5.,c#
p                  e      g. . ... . . C , S .:.                      .v .. i ++.            .
S.. .? .i. . , ae .                           O.  ..E..
                                                                                                                                                                                                                                                                . ,e
: p. . p. 3 5 ,- . 1                                                                      **
                                                                                                                                                                                                                                   . . .         ikae. ..
                                                                        . n.               O.4f           < #.        . a. m. .u. .q a. w 4 .*                .t e.,g       e. .t a.c.t . E . t .m.                       *
* e                                             .     ,s .     .e ... 4 g .= a. .
         .o   . g e ., .s. y .             .un. ..         <g
                                                                        . ... .. . . n c.                      a ...
: e. ..               ..,e.,
                                                    .           ,--        .. .... ..-:-. .. j - . . v. .,
c.:         a ... e.         . . c. .a ..    .      g .a .n g.         .                  . . . < . . , ,
  ,i                         s p. .e ..e a. d.             ayvar*.                                . ' . v.s s a. .- . ' S t a. d.            .                          s u .'..'.e. .' .v + .*. %                    *.                    * *
  !                         have exceeded Tecnn'es; Specificati r.'i-its.
l Apparer.t Cause of Occurrence:
At n:rn on 2 .' * #,/ ~ 6 t h e 2A W*.'U
                                . .. . ..e 3                     e                                                                                              fi her der'nerfsl.jter                                                                    v '. s 6 . r...             o.
                                                                                          . r .. . t ..    . . .. x     ..           we s....>.
                            .o       e.        .,           .e. } . g .e. .a g .'
v a t .h. . 4 a v. . r,e *.is.a .
                                                                                                                                                                                                                                            . S *. e. *. .
y.- ~ u '.         . ~c        ~,s , .. y,    - p s g. g 4 $ 3 ..
                                                                                                                                                                                                    %        y.,   ..          .u. '. . .;.            # .#
E D..        ..L.w      -              .                  --
O S a. . L                .. . aE .. 9e .c ..
y     ..              . n a.n          .                .
: t. C . ....    .*.4                       --
                                                                                                                                                                                                                  . f e. e. - .x. . . .                 .
sa.4           .        a y p % .e ..T. W' ' E . . *.*
                                                                                                          .        e .8 .,'..a.  '
                                                                                                                                                     '. .# *. ' .3* .#
3 p y- .4 o. y3 . .e .e { e. .,1 .* a. a.... ,. *. \. 7. ,. c - .                                                                                           . ..' .# .*. e i '" ==- *. ." S. o. .' . . .                           *
                                                                                                                                                                                                                                                               .".5
                                                                                                                                                .,.                     *..
* b... . *a      . .m.. a. t..-.*.*- .f.e                              .*..      .%3 e ..
                            .   .t . g .* j..                         wgy             y g ..a w    ..p.   . .a , .... ,n
                                                                 . . . .                                                       . . .T.. .                      ._g .
                                                                                                                                                                         ..   .g. .g .g a. . .a. . .ag4                           5
                            .' r. tw.ba Y e 5 5 *. 1 V e ". *. ~. * *6 *.* e #.*                                                                                                                                                           .e i. . .      ,
                                                                                                                                               ~ . ^ .. .***        .         h. % *.* .k V E a .b.
                                                                                                                                                                                                                       " m. a e *. *.* #. *. . .* . % *. 4. .
                            *h...>
                            ..                 b. .e. r . ,*r, vg3D . ..... a j y 4 .8 . g.                                     ., g e.      g       *
                                                                                                                                            .           .2            ..q
                                                                                                                                                                      .         ..*e4           ..
                                                                                                                                                                                                ... . ..       h. . ..         .....*.,.r.
3 .7 + ..* .                   e. .b. , f...
s . k. .. % v.
                                                                                                       . 7. ti,. s . e...     .e. i , r . V .4. . . 4..                            k .* *. ,A.*.=
                            - . .'. e s s a. .d.                   '. r a - *a..Sa ,C a .. *. .
                                                                                                                                                                                                                  .e
                                                                                                                                                                                                                   . . .           _ $ $ e e.
S   3 i
Analyais cf Cecurrence:                                                                                                                          ,
2
        ..                  ~he s nr .t .
                            .                              .       ,.s     ..
                                                                                      ., o
                                                                                                .e e .e. -.                  .n s     .4                   4 F. e. K e. a.                            w i
     .T                                                                                                                                  . . . .                                      tt        s.a.              .            .  .s. t,       .,  . . .          **
                                                                                                                                                                                                                                                                  . ..s. e peak
                            ... .(i n u~
                                    .          . -         s s.t a,:nn.,. 9.r.c o u - release rste vse : a l c u '. a t e 1 t: te i se ..
                                                                       .                                                 . . .             e .. .n e . . s ,. e
                                                                                                                                                                                                ..a t e o times the 'e:hniesi speai tt esti: n limit.
                                                                                                                                                                        .                       .                         --          t.>.....               -
E n.1 '.* r. i t 3 rocf vent relasse                                                                                                                                            '~ h e = sin 3 : v >.
 '                                                                                                                                                      r M e s r e = s i n'e d                                         .n t? h s . g e 1
{
suring the perici *hst the 2 r M r *(e n *, reletie
* S.t
* VW h i "--         .
8401090581 760219                                                                                                                                                                                                                                                       . m.7 PDR ADOCK 05000277                                                                                                                                                                                                      .
S                                                   PDR

                                                                                                         ~
O                                                           o mr-.ma. ..__ _ __ _ . -    -- __:_               _
pf         0 lII _.(C A YO f
                                    -                                                      b
                                                                                          ,. 2 -
                                                                                                      '         -           i Repartsble Occurrence
                                                                                                       ~
Pro =n.t.
Notific.ation.
                                                                                                                        '2-76-11/IP
                                                                                           ;.         1. c
                       ~         In less than 10.=inutes the enleviated Unit 2 rdor v e r.: relcane rate vac leks.than 7echnicci Specifiention~-
limitc.           1he total length ~ of ti=0 that t ~g                                re Unit 2 ronr vent relesse este was higher than nar=e1 less than 63 =1ns.
Initial enslysis of the particulate 'f i l t e r s and Icdine                                                              ~
cartirfages indicated no signifiennt increase in particulate or iodine release rates.                                     An iscropic analysis'was ran on a gas sanple obtained during the relcace (about thc 391dp int of the release,.                           It indicated only Xe 135 and Xe ' ' ' , in s 1.62 to 2 ratic.- It was estimated ,that the activity released
                               'd u e ta this spite vss about 20 cures                                             .(basec on Gross Sadisti.
Roof Vent Monitor Reacings).
The release calestions for roof vent releases contain an MPO of 3.3.33 201/cetE 10 =in old off cas =ixture per T e c h t. i c s 1 Spe ci fi c ation. However, i r, this case the =ost liciting ?.?                        for the =ajor activity vcuid be 3N7 30irce.
If tne ::st li=iting MPC of activity measured is aces in the
           !                    releace esiculation ,                                                             e         '
the Tecnni:El Specifiestien release li=it is                                                            -
                                                                                                                              .pbxceede:.
i based an tr.e above, the short ter= lenrtn ;f the release sno the fact that the =sjor messures activity. vere neble I
P. anes. %he effects frco t t. i s resence shouli be very cinical.
Corrective Action:
7 t.e release was shsr; term in nature; no i==ediate                                                      orrectise s.c t i o n was possible.
l           Failure Data:
* N:ne Sinilar.
Very t ruly ycurs .
W. O.       U1. rich, Saperintendent Fenen Ectta= Ato=ie Power 4:ation 1
l 1
l i
   !                                                                                                e i
e i
n e                                                               *l
                                                                                                                                                          -v.*
s '.
* _           .     .. . . . . ..
}}

{{LER-Nav}}