ML17252A258
| ML17252A258 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 01/20/1977 |
| From: | Stephenson B B Commonwealth Edison Co |
| To: | Keppler J G NRC/RGN-III |
| References | |
| 50-249/1976-36 | |
| Download: ML17252A258 (6) | |
See also: IR 05000249/2019076
Text
- *** , L ; R.R. #1 8'.\ I . Morris, Illinois 60450 Telephone 815/942-2920 BBS Ltr. 1177-50 Mr. James G. Keppler, Regional D.irectora te .of Regulatory Operations -Region III U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen:Ellyn; Illinois 60137 . . . ........___R egufatqry* .. please find Reportable Occurrence report number Cy. This report is being submitted to your office in accordance ,the Dresden Nuclear Power Station Technical Specifications, Section 6.6.B. BBS :jo Enclosure cc: Director of Inspection & Enforcement ?' ,-:;...::;, v.* B. B. Stephenson Dresden Nuclear Power Station DireGJo.r of Managem.ent Information & Program Control File/NRC ... ** J .l. 888
'CONTROL BLOCK: .LI ---1 1 . 6 . e,LEASE PRINT AU REOlJiRED iN:FORMATION] LICENSEE NAME @E] Lr I LI nlRls I 31 7 8 9 14 * . LICENSE NUMBER I o I o 1-\1 o Io Io I o I o 1-1 o I o I 15 * 25 REPORT . REPORT LICENSE TYPE I 4 I 1 11 1111 I 26 30 EVEN.T TYPE I 0 I 31 31 . 32 , CATEGORY TYPE.' SOURCE DOCKET NUMBER . EVENT DATE REPORT DATE @El CON} I I I w LIJ I o I s I o 1-1 o I 21 AJ 9 I * t 1 J 2 I _2 I ) I . 1 I 6 I I o Lt P JQ..J.7 L 1 I 7'*" 8* *57 . 58 59 60 61 ** s0** 69.* * **** * * 74 75 * 00 EVENT DESCRIPTION * * Jo'21 J. A routine surveillance aud:j_.t .conducted by sta_tion personnel ,:revealed that a number I 7 8 9 BO @@] I of surveillance intervals had been inadvertently exceed.ed during the six-month.* I 7*'8 _______ . -.8-10 jbj41 *I * * period following a Tech Spec revision '."hich Jiniited those intervals. Tech Spec I 7 8 .9 .. 80. lolsF I sectJon 1.0. c. C (a) and (b) .(which becam'e ef'fectTve in* 1976) specified *that I T B: __ (o]sl '-.' _(;;;..?_)-'.'-$._l.l_rv_. e_i'-.)-'_ ,e_i_* n ..... ...... p._o_t_.,t_P ..... -:::..*..:JI 7* 8 9 SYSTEM . CODE [§Illzlzl 7 8 9 10 . CAUSE *cooE 11 .. COMPONENT CODE * I z I z I z I z I z I z1 .. 12 . 17 .. CAUSE* DESCRIPTION . PRIME COMPONENT SUPPUEA 43. ;coMPONENT. MANUFACTURER I z 19 19 I 9 I 44 47 80 VlOLAOON * (Continued) 48 jo Isl __ s_t_a_t_i_o_n_s_u_rv_._e_i_ll_ .. a_n __ c_e_s_a_r_e_s_c_h_e_d_u_l_e_d_*_a_n_d_. _u_p_d_a_t e_d_w_e_e_k_l_y_o_n_a __ c_o_m_p_u_t_e_r_._*--F_r_o_m_t_h_e...;, . .;....._--11 7 8 9. . 80 joj9j j t.ime surveillance by compute:r;. began until December 6, 1976, surveillance . I , 7. 8 9 80 _ .... s_c_h_e_d_u_l_i_n.;:;.g_w_a_s_p:;...e_r_f_o_rm_e_d_o_n_a_* _T_h_i_* s_m_e_a_n_t_t_h_a_t_*_a_m_o_n __ t_h_l.;_y_* _i_t_e_m __ .;....._JI 7 8 9 FACILITY *.METHOD OF (Continued) 80 STATUS \Iii POWER OTHER STATUS *DISCOVERY DISCOVERY DESCRIPTION EEJ I 0 I 9 I 3 I ___ _.,,,I 7 8 ... 9. 10 12 13 .. 44 ,,45 NA. ,. *46 80 CONTENT * FORM 'OF ACTIVITY RELEASED lzJ OF RELEASE AMOUNT OF ACTIVITY . .. uJ t NA 1 10 _ __....;;.;... ____ . I * NA .. LOCATION OF RELEASE I 7 .. 8 .. 9 PERSONNEL . NUMBER [ill] l OJ. 0.1 0 I 7*. 8 9 .. 11 ExP.OSURES ;,: " TYPE 12 .. DESCRIPTION * NA.: 13 PERS'ONNEL-INJURIES . NUMBER 'OESCRIPT.iON *, /' 80 EEJ I 01 01 01 __ 7. 8 9 11 12 80 OFFSITE CONSEQUENCES EE NA. 7. 8 9 80 LOSS OR DAMAGE TO . FACILITY TYPE DESCRIPTION (!fil;.Uj . NA 7 0*s * .10 80 PUBLICITY' .. filZ] 7 8 9 NA. 80 ADDITIONAL FACTORS NA* 7 8 9 80 NAME; __ ....;N;,;.;i;;;..mm..;.....;e;,_r;__ __ .,...---------* T_._2_2_2 __ _ *GPO 881*117
- \ .. -... *EVENT DESCRIPTION (Continued) (b) that the total combined interval of any*3 consecutive interirals was not to exceed 3. 25 times the specified inte.rval.. Sur:ve:i,llance interval wer:,¢. identified in both categories .dE!$C.r,ibed above* It was .also noted during the audit that certain surveillanc.e items had not been* conducted .*. (Seec*attached. list for titles of surveillance items,. involved-.) (50-249/1976'-36) CAUSE DESCRIPTION (Continued) was scheduled for the same time period each month regardless of when it had been performed the previous month. Consequently, if a monthly item, for exa,mple, were performed.nine.days "early," by the time the.item .. appeared on the .schedule -to.be performed ag_ain, the interval plus 25% would have alreadY._* e_lapsed, resulting in a Teel( Sp*ec violation. Ju.ne, 197.6, a course of action .had been c:l.ecided upon _whi.ch woµld ensure t.ha;.t .. surveilla.nce intervals did not exceed t:he_.*re:vis:ed .. limits. First, *the *con'fpU'ter .. w:as ... to b.e ;t';eprogrammed to schedule on a d,ate-:.cione :ra.theL .. than .o.n .a frequency basis. A formal request for program *niodifications was initi_ated in* July, 1916. These modifications had been programmed, tested, and successfully implemented by December, 1976. Secondly, a base date (desirable surveillance date) was to be assigned to each regularly scheduled surveillance item to provide a stable reference po.int. This. phase has been substantj ally completed., and-final base. date is expected to be entered into the computer no later than February 1977. Successful implementation of the program described above will permit a prompt comparison to be made between a given surveillance item's scheduled date and its base date. In this manner it will be possible to determine readily whether a surveillance item has been performed within the required inte.rval. To ensure that any discrepancy is identified in a timely manner, all surveillance items will be viewed on a monthly basis. The number of surveillance items involved in this event represented less than* 1% .of the t_otal nllinber of surveillances conducted duringrt:he period in-"-"ques'tion * The safety impiications of this event, therefore, we+e c<;>,nsidered to be. minimal>. Surveillance interval violations were identified concurrently for all three units at D.r.esden. ' .. -... *{*--***-* -*1-. ?:--:---*-:, *** .-.-*-.. *-*---*-:-**-**** *** * *** * ... ... *--.-.. .* ,.,.>4 *. . . . . ..... . . .. : .
. ... ; *, ' .. .. -* .. ** :t:: .. . : .. : , .. INSTRUMENTATION.. A,REA suRv. *sURv .* * F * EREQ. ITEM.NO. Q. M. -M*** M *M M *,:.* M 007 007 Scram * 1* * APRM Upscale, In6perafive: & Downscale *. Scram 3 APRM Upscale, -Inoperative & Downscale 016: .. *1 .Sfilf:Upscal.e':Rod. Bfock .. 018 * ** 3 .RBM *upsGa*f:e Downs*cale: Rod. ;Block 019 0,19 02,3 028 l APRM Flow Bias Upscale & *nownscale *.Rod Block * 3 APRM Flow: Bias Upscale .. & Downscale Rod 1 Main Steam Line High Flow Isolation_ . IiC2.J.a.e:J.01 1 * Isolation Condenser Steam Line High Flm Isolatio1 " :..' . .* . '*tECH.* * 4._2.1 4.1. 2 4.2.1 . 4.2.1 4.2.1 4.2.1 4.2.1 M 029 1 Isolation Condenser Condensate Line Flrn 4.2.1 ... , M 042 1 Containnient Spray ECCS * (2) *' 4. 2 .1 M : 042 3 Containment Spray Interlocks ECCS (2) 4. 2.1 ... .... . . . . . .. M 051 3 Rx Bu.ilding CCW .Radiation Monitor 4.8.C M 052 1 _Servic:e Water *R.aaiatfon *:Monitor 4.8.C " " .. : .. ,. -' * ... -.. " DATES OF EXCEEDED.LN-TERVA' 8-17-76 To 9-28-76 -.:::*; .. 7-19-76 To 10-28-76 :8-17-76 To 11-:29-76 11-3-76. Tp H'-13::)Q ___ . 8-7-76 Jo .. ---* 8-17-76 To 9-:;-28-:7.6 .. .... : 6-18-76 To ' , . To To ll-29-< 6...:19-76.To 7-30..:. 7.6 .. 9-15-76 To 10-24-76* .. ',':;.'* . '. 9-15-76 To 10-24_:.76 8-17-76 *To 9-30--76 8-:17-76 To 12-4-76 6-:14...:76 To 9-29-76** ... *. 6-'-14.;_76 *to 7-23--76 .... **. *F.Q ... *of ViOJ..ation.: . . .... *-:.: .* .. -* ..... * . : . * *1 . "'". 1 Frequency Interval Plus 25% Exceeded . . * . * . _;.;. .... . *-. ' .** ... **. * ' ** 3 *.,. 3. Nprmal Interval Plus Single* Interval 25% Exceeded. 'M c. Surveillance v* * .. * .. ;. . *. . * . .** * ... ..... . *.* .,..
, .. :*. 1.* . ' *. -. *.*. . j ** .. : :,. . *:: :t .. -.. . >./'. =>--: > *.. . . ' ..... . ! . . .. OP.ERATING A,REA SURV. ** SURV. * F 'LREQ. . ITEM NO . 0. * * 012 3 Core Spray Pump Operability '* .' M. 013 .3 Core Spray M.O. Valve M ..... .9.!.:'L:.c .. )1 __ . .Jlj..gJ:i. PJpirig Inspection* * M ** *016 * 3 ** . LPCI * Pump * . . . , ... .M .* 017 3 : -LPCI M. 0. Valve Operability M 022 M Torus/Drvwell *Vacuum Bre<itker Cvclirti? 022 1 Torus/Drywell Vacuum Breaker Cycling i 1 MSIV Trip and Timing , . 02_3 i .-_:-..-.:...,_-1 HPCI Pump Oi:ierabilitv M* -<: 028 **, .... ... M 029 1 HPCI M.O. Valve Operability . Q 030 1 HPCI Flow Test* ':. .. :_g: * 047 . M Abnormal Procedure Dd:lL ........ : .. . . ... *. ' .... * . . 1* -.. *.* . -*--. *.-. . . . . . --i : /,. . '*'.rECH ** * * DATES OF EXCEEDED.lN-TERVA:. 6-18-76 Io 9-27-76 4.5.A 4.11 Not Done* June :Thru -Sept .. 4.5.A 6-18-76 4.5.A 6-18.:..., 76 To_, . 4. 7.A 4 a Not Done Ma'l or June 4.7.A.4.a 8-8-76 To 9-30-76 * f--** 5-3-76 T6 8-29-76 6-ll-76:To 4 . .s:c;:***:--7-2i-76 To . 4.5.C 4.5.C * . ....... _-, ,* To 7-21-l6* 7-21-76 To * . 5-4-76 To Npt Done* Since. 7.6 . ** . , .. .* . t -** * f ** .,. .. * *.. " .. *F.Q *. of Frequency" VicU.ation: .. ***-:: .*.: . * * :1* * .. 1 Frequency Interval *Plus 25% Exceeded ..* .... r,: ... :._':: -' if-:: ' 1:-... -..... * .. :.: 3* .. 3 Times Normal. Interval Plus Single Interval 25% Exceeded *. "M * Missed Surveillance. . * .. *.* .. *: *.-* *-.. :_ i: ... : 1 :*:-.*.: . -. . .. .. ..
.. ... ;.'I . . :*I * -I j * ** * j * y *:. '. ., .... . . ** .. . ,' ... * ..... . . t .. RAP-CHEMISTRY A.REA . Y .. .. ;. SURV. S.URV. * * F 'EREQ. * . ITEM . NO. Q. .. * DES_CRIP!LON * DATES OF: EXCEEDED .LN-TERVA * ... *. ... Reac.tor Water: .. 4.'6.C.l.b 9-15-76 * . ,;, .. ** *,, .. . . 'l._._ '.**. .. , ..... * ..*. -. .. .... *. *. .. " . . ;, .: ' . ' '*.* ! . .** .* .! .. .. * ... _* .. ..*\: . ... -:* .. * .. .. *. , . *:**** . *.:* ... . . *F.Q *.. = .Type of Frequency* .. : .* :-. * *_ * * * * *1 .... 1 *Frequency Plus 25% Exceeded* . ... 3 3 Times Normal Interval Plus Single. Interval 25% Exceeded . ': .. --:-*.*** ..... 'M c. Miss.ed. Surveillance **.,* *.:. **. :. ' *. ..... . .. *,