View source for 05000259/LER-1982-089, Updated LER 82-089/03T-1:on 821103,primary Containment Purge Sys Failed to Achieve Required Flow Rate.Caused by Sand Dust Clogging HEPA Filters.New Filters Installed

{{Adams
| number = ML20073C647
| issue date = 04/08/1983
| title = Updated LER 82-089/03T-1:on 821103,primary Containment Purge Sys Failed to Achieve Required Flow Rate.Caused by Sand Dust Clogging HEPA Filters.New Filters Installed
| author name = Mulling K
| author affiliation = TENNESSEE VALLEY AUTHORITY
| addressee name = 
| addressee affiliation = NRC OFFICE OF INSPECTION &amp; ENFORCEMENT (IE REGION II)
| docket = 05000259
| license number = 
| contact person = 
| document report number = LER-82-089-03T, LER-82-89-3T, NUDOCS 8304130245
| package number = ML20073C623
| document type = LICENSEE EVENT REPORT (SEE ALSO AO RO), TEXT-SAFETY REPORT
| page count = 2
}}
{{LER
| Title = Updated LER 82-089/03T-1:on 821103,primary Containment Purge Sys Failed to Achieve Required Flow Rate.Caused by Sand Dust Clogging HEPA Filters.New Filters Installed
| Plant = 
| Reporting criterion = 
| Power level = 
| Mode = 
| Docket = 05000259
| LER year = 2082
| LER number = 89
| LER revision = 
| Event date = 
| Report date = 
| ENS = 
| abstract = 
}}

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(PLEASE PRINT OR TYPE ALL REQLilRED INFORMATIONI CONTROL BLOCK: l 1
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M l8Al                  1.l Bl Rl Fl 1lhl0 l0 l- l0 l0 l0l0l0I-l0IOl@l4l1l1l1l1l@l 14    15                       LICENSE NUMUEH                        25     26       LICENSE TYPE JO l
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7               9           LICENSEE CODE CON'T 10111 7           8
                                 "'I[RcE 3     "' l  60 Ll@l 0l S l DOCKET 61 0l 0NUMBER l O l 2 l S68 I 969 @lEVENT            I l 110DATE l 3 l 8 \ 2 ]@l 74      75       REPORT 0DATE l 4 l 080l 818 l 3 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h l
i        10121 l Durine n nnintonnnce nurnen nfenr vnncene scrnm. uhilo norformine ST 4.7.F.1                                                                            ,
10131 l (Primary Containment P_Jge System Filter Pressure Dron Tent) . the primary centainment l
                                                                                                                                                                  +
l ilO l d t I nurce system failed to achievo the reoufred flow rate of 6000 CFM - 107 lOI5ll ( T. S. 4.7.F.1).                                      There was no dancer to the health or safety of the public. The                                                            I I
f         lO161l 2 dundnne nenndbv ens fronemont system una available nnd onernble.
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10181I                                                                                                                                                                               so SYSTEM             CAUSE         CAUSE                                                          COY P.          VALVE CODE               CODE        SUSCODE                    COMPONENT CODE                     SUSCODE          SUSCODE 10196 l Sl cl@ Lxj@ Lt]@ lr i T IT l m I v l a l@ LzJ@ LzJ                                    18           19             20 h                          9           10          11            12              13 7                                                                                                                                                                       REVISION SEQUENTI AL                            OCCURRENCE             REPcRT EVENT YE AR                              REPORT NO.                                 COOE                TYPE                        N O.
LER
                            @ gu /RORE l8 l2 l              [---J         l0l8l9l                    d               10 l3 l                lTl           [ _;j       [1_j 23           24               26         27             28        29           30            31           32
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is-                        3i           34                   3s               a                 37                     *o    41               42                43             44             47 CAUSE DESCRIPtlON AND CORRECTIVE ACTIONS h -
f 1 ( c l ~l The HEP A filters (MSA model B-SK-174 3-1098-1 T unro cincond ufeb n nnedorv enbeennna that prevenCed achieving the design flow rate.                                                   Laboratory analysis confirmed this                                  ;
substr.nce t a be sand dust, mOstprobably from sandblasting. New filters were installed y
                             ] and satisfactorily tested.                                The unit 3 HEPA filters were flow checked on January 10.                                                    I i 3 l
l 14l l 19 3. No'further recurrence control is recuired.                                                                                   _
80 7          8 9 ST      S         ; % POWER                         OTHER STATUS                  Dis         Y                           DISCOVERY DESCRIPTION l1 l5 i W h [0j0l0lhl                                                  NA                     l      (,D_jhlTnserviceinspection                                                          l ACTIVITY CO TENT RELEASE CF RELEASE                             AMOUNT OF ACTIVITY                                                          LOCATION OF c1ELEASE Qda 7               e .            [h!
io            ii NA 44 l           l 4s NA so l
PERSONNEL EMFOSURES NUMBE R               TYPE         DESCRIPTION l
i Ldz] I 0101 Ol@l12 zi@l
           'fi'8 9                             11                    11 NA 30 FERSONNE L INJUHIES NUYBER                DESC3 tP TION b l 80l0 7
9'g 10 lh[1  11       12 NA 80 l
4   LOL M OR 4;AMAGE TO FACILITY I TYPt           DE St olp T 80N
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io                                 8304130245 830308                                                                                                     so ss                 PU8ticiTv                                                                                                                                  NRC USE ONLY PDR ADOCK 05000259                PDR ISSUE        DESCRiP riON g                                                                                          111I1111111?l 12d ol Lsj                   l                                                                            NA                                         I af 9m                                                                                                                                   68 69                            ao s
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f, Tcnn:ssee Valley Authority                                     o            Fcrm BF 17
   .'.      *,      Browns Fcrry Nuclear Plant                            -
BF 15.2 2/19/82 LER SUPPLEMENTAL INFORMATION
                  < BFRO     259 / 82089 R1 Technical Specification Involved           4.7.F.1 Reported Under Technical Specification 6.7.2.b.(4) x Date Due NRC
       . =
Event Narrative:
  -                 Unit 2 was in a refueling outage, unit 3 was operating at 99-percent power.
Neither was affected by this event. Unit 1 was in a maintenance outage.
 ~
Surveillance Instruction (SI) 4.7.F.1 was performed on the primary containment-
   ~
purge system. Technical. Specification 4.7.F.1 requires the pressure drop across *                     .,
the combined HEPA filters and charcoal absorber banks shall.be demonstrated tot f;'if
 .                  less than 8.5 inches of water at system design flow rate plus or minus                   J7 10 percent. The required design flow rate (6000 CFM ) could not be achieved.
ThepressuredropacrosstheHEPAfilterswasnigherthannormalbutlessthan}j',
8.5 inches. The HEPA filters (MSA Model B-SK-1743-1098-1) were removed and               '
l rt inspected. No damage was found but the HEPA filters were clogged with a                           -.
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powdery substance. This material on the HEPA filters prevented achieving the required flow rate. Prim'ary containment was visually inspected for the source               ,
 -                  of the powdery substance. Nothing was found. Laboratory analysis confirmed the' powdery material to be sand dust, most probably resulting from sandblasting             -
operations associated with previous torus modifications. The redundant standby gas treatment system was operable. There was no danger to the health and safety of the public. No problem was identified on unit 2. The unit 3 HEPA filters were flow checked in January 1983 ei                                                                          ,
                                                                                                                     ~
* Previous Similar Events:                                  .
                                                         .                                     g~
BFRO-50-259/ 82029                                               -
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Retention:   ?eriod - Lifetime; Responsibility - Document Control Supervisor
* Revision:     M
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