05000280/LER-1978-038-03, /03X-1 on 781108:review of Operational Data Showed That Quarterly Calibr of Nuclear Power Range Instrumentation Had Not Been Performed Per Schedule,Due to Scheduling Error

From kanterella
(Redirected from ML18113A819)
Jump to navigation Jump to search
/03X-1 on 781108:review of Operational Data Showed That Quarterly Calibr of Nuclear Power Range Instrumentation Had Not Been Performed Per Schedule,Due to Scheduling Error
ML18113A819
Person / Time
Site: Surry 
Issue date: 02/02/1979
From: Baucom T
VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML18113A817 List:
References
LER-78-038-03X, LER-78-38-3X, NUDOCS 7902060329
Download: ML18113A819 (2)
v • d • e


LER-1978-038, /03X-1 on 781108:review of Operational Data Showed That Quarterly Calibr of Nuclear Power Range Instrumentation Had Not Been Performed Per Schedule,Due to Scheduling Error
Event date:
Report date:
2801978038R03 - NRC Website
v • d • e

text

[/ Ti) corn i"WL GLOCK:

e LICEr*.1::;Ef= EVct'H :*:.:POi'lT LL_l_l_L_L_l Q I

f, e

(Pt.i;/,.S!:' p;rn,n 0:1 TYPE ALL REG'JiHi:D li*ff0!1Mi\\TIOi'J)

CON'T

[~~-1.jJ 7

8

~;.~~!~~ L~(D l.-~~L~_g_l _ 0 _L~_?._LJ~ _l__gJQ l __ J,LJ.L.. Ql~::J_7j__ _

_r.~(0 l-:-GL2J.sJ__ -_2.1 ___ -i ! c;j G)

(.J Gl DOCl,E:T r*JU1\\1:1ER Gf1 G£1 F.V[r~T D/*TC 7.,

/'.)

Rt:POH I UA I~

t,O E\\'EJ*;", U:cSCRIPTIOf*J,\\ND PROBt,,;L(, CONSEOLIEf,J.":U;@

r 7.c>--J_-_,_-,**

0 1'*

1_1*._r.. :*. -~** __ ~_n.L. '"-.:__~_::* *. ~**'

L~ 0 T,, -.. ].*_.. 111*. C,~.-._). s

. C

  • I J '

I

~

\\.'\\

~*pe_c.1.t1*:*t;.t1ons +.. ~fi. and J.~3 rer~ortcd i18 _I:.?!" 'fr;c.hn!..c:=,l __,Sr,;::_t_:

,. ___ J [n IIJ L f::i_ c_.~ '.: i c_*n_. ~-; _6_._6 ;_3..:!?._* 3_

J [9__[(] L_ __ _ -------------------

[oJJJ L_ ----

fol8J L

---******_J 80 SYS-Tt:i.l CODE

  • 12.L!2..I G 9

10 Ct,USE CODE L!U@

11 COMPOi*iENT CO~*E L!.Lli.1... xLtlJ~.I.JLl 8 13 18 SEQUENTIAL OCCUR fi ENCE LE R 'f!O fEVEiJT YE/I.Fl REP(JflT NO.

CODE

@ n,r*orn I [7 1 8J I __ J l or 3_L_81 I/I I g_~{

NUME\\lfl L:...:__i(l --7-.2 l==.

~

'..J

~

0 23 24 26 27 28 29 cm.1P.

SUBCOD::

L~J@

I" f1EF 0:'1T TYPE L_x J 30 1//\\LVE SU8CO'JE L~J@

20 31

,CTiC*i/

FUTlif-:1=

EFF[CT SHUTDOWN Q

ATI/1.Cf!MENT NPRD-4 TI-.KC'*:

ACTl(.l~

0'*;,,,. ;\\NT METHOD HOUPS \\:.'.:J SUBMITTED FOP.\\*: $UG.

rrw,n, crn.1P.

SUPPLIEf°'

REVISION NO.

!__LJ 32 COMPOiJ[~.:T MAilUFACTLl*1~Fl

!._~J@~J@

l2~ __ J@ ~ L~J~_L 1.l.U ~

(§.)

L!.~_I@

3 3 3.;

35 36 31 40

.\\ 1 42

~I L~~l-2l.EJ@

CAUSE DESCRIPTION,C.,f\\!D CORRECTIVE /,CTIONS @

43 44 47

!This event resulted fror:i a sche<ll!l i_~2g__ error..

l-'(1LlC8.l

""C' l"('(l1T;,.. '

1 J

'~~.

l..t cL,-:J

1..1 *.! i.. \\..:-;:.. :
  • -*-----~--,.... __ _

[17

_1... __ J !by Tec+nical Sp<?!cificat:ion 3.18.U and the calibration cornplcl:P.d irt ~ccm.*dc:nc,". w:i_t> ___ ~

1., **. : "tina nroc<>dt>r ~"

r:-*r--;.;1 L~...L.:*....J L.'.:::::.:~:

G

  • . t.:,,. *---- --------------~-----
  • --------*-----[

[IT:TJ I ________ ------*----- __

"T::i"'"l I L..1............ ~

8 9

F/\\CILl*:*y ST/,TU,;

% PQ\\'JC:R OTHER ST/,TUS r~r;:-.. 1 l "' J 9 L lj O I OJl(?,1 NA L'.....::...

-"-'*- \\.::::J

-* __ :::..L __ u...

1 _______ _ 0

.J 8

'.l 10 12 13 44 ACT!\\'IT\\'

CONTENT Q\\

H!:LEAS:.:D or-RELEASE AMOUNT OF ACTIVITY ~

[\\~l;J J..~.J @ l_!:J@l_.

NA r

__.=__j 7

t;

!)

10 11 4-1 r:.::*,

,.*.::.~*!:

r* (';'ti~~

Di.::.":.Ci";J\\"J i'1UtJ \\:~_!)

_ _____ J 80 METHOD OF r:;:;-,

DISCOVERY DISCOVERY DESCi11PTION \\[!_;

LcJ@~I __

E_n-g_i_n_e_e_-._r_s_o_b s er._,_.r c._'l_t_i_c_,n ______. _______ _J 45 46 80 L

NA LOCATION OF RELEASE@

*--**._. ____ _J 45 80 [J?J 1.~1.. _!_ *~-l~J0~_J@._I _I_*lA_-__

_ --------*. ***--~*---------***-----*----------

_______ J 7

fl 9

11 12 13 l'E*,SmJNEL INJURi"S NL;;.;,;E!l DESCHIPT!Dr*l 41

. [1 DJ l_Q_j__~j-2._j@J

_NA_._* ------

80

'--- _____ j s :,

11 12 LOSS Or OR DAr,'..AG!: TO FACILITY l'.::j\\

TYPE DESCRIPTIO:<

'\\::;)

~GJ l~K0l NA 80 8

9 10 PUBLICITY

(;;:\\

ISSU"l' DESCfllPTION ~

80 NFlC USF. ONLY EE !.!~]@!___

NA 790206 o 3 d-9 U.-.W_L.LL LJ._J_CJ ~

8 9

10 NAf\\'iE OF PREPAFlER T. L. Baucom_*_, _____ _

PHQl,JE:.

68 69 SOL~-35 7-318L}

0 C.

0

,--~--.

e Surry 1'01-,er Stat ion, Unit l Docket. No:

50-280 Iteport lfo:

Event Dnte:

7G-OJ3/03X--l 11...:03-?3 Title of Report:

Inc or*e /E:~:c ore Inst ru1ne nt Ca. l ibr at _i_i Jn

1.

Descriptjon cf Event:

Upon review of opcr.1t:ional data, it was cktecmiilcd the.t the quo.-::-terl.y cali.b:r.a!:ion of thl*! nucle~r po\\.*!er range instru1n(!ntation Ly H!?.i'.1.a:5 o.f the movable incore de!:,- *tor system h.:id not b2cn perfor1c:2d as schccblcd.

This is contrary t:-_: Technical Specific.:,tions 1:.* 1.A_ and is reportable as per Technical Specific.::itions 6.6.7...b.3.

2.

Probable Cor1sequer*i:.es ur,d.. _._Status _of R2cluecl;:.11t_ Systc~ms:

The nuclear Pm1e.: Range instrumentation is c-1libr.2ted on a cl--1ily basis <1ga:i.nst a heat bQl<ince* standard.

The upp~r and.lo\\.Ycr ion chrnnbE~r current~ are recalibrated quarterly to assur2 valid function of those protective fe~tures using F ( 6. I) as an input value.

This calibration is checked on a monthly basis and ~-7,2,, within 1% on the map taken 10-17--73.

Therefore, the h,:;llth and safety of the~ general public were not affectcJ.

3.

Cause

This event was caused by failure to adequately schedule the PT that tracks the core exposure.

4.

Imc:1,~diate Corrective Action:

As required by Technical Specifications 3.18.B, the unit's pc~*.'e1*

was reduced and limited to 90% power.

The data required for the excore detector recalibration was taken.

Initial annlysis of the data indicated that the existing Incore/

E:*:core detector calibration was within l'.t, which is well within the required Rpecifications.

The unit was returned to full pow~r.

Detailed anal.ysis of the maps provided the data for comrletion of the recalibrn-tion procedures.

6.

Actions Taken to Prevent Recurrence:

Personnel have been reinstructcd and schedule modified to provide for closer tracking ~of core exposure on a weekly rather than rnonthly basis.

7.

Generic Implication~}

None.

Retrieved from "https://kanterella.com/w/index.php?title=05000280/LER-1978-038-03,_/03X-1_on_781108:review_of_Operational_Data_Showed_That_Quarterly_Calibr_of_Nuclear_Power_Range_Instrumentation_Had_Not_Been_Performed_Per_Schedule,Due_to_Scheduling_Error&oldid=4997714"