05000368/LER-1980-004-03, /03L-0:on 800107,during Mode 1 Operation,Core Protection Calculator B Failed.Channel B DNBR & Linear Power Density Trips Were Bypassed Placing Reactor Trip Logic in two-out-of-three Trip Sequence.Cause Unknown

From kanterella
(Redirected from ML19296B357)
Jump to navigation Jump to search
/03L-0:on 800107,during Mode 1 Operation,Core Protection Calculator B Failed.Channel B DNBR & Linear Power Density Trips Were Bypassed Placing Reactor Trip Logic in two-out-of-three Trip Sequence.Cause Unknown
ML19296B357
Person / Time
Site: Arkansas Nuclear Entergy icon.png
Issue date: 02/15/1980
From: Pendergraft R
ARKANSAS POWER & LIGHT CO.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
Shared Package
ML19296B355 List:
References
LER-80-004-03L, LER-80-4-3L, NUDOCS 8002200450
Download: ML19296B357 (1)


LER-1980-004, /03L-0:on 800107,during Mode 1 Operation,Core Protection Calculator B Failed.Channel B DNBR & Linear Power Density Trips Were Bypassed Placing Reactor Trip Logic in two-out-of-three Trip Sequence.Cause Unknown
Event date:
Report date:
3681980004R03 - NRC Website

text

.

NRC F ORM 3f,6 U. S. NUCLE AR REGULATORY COMMISSION (F 773 LICENSEE EVENT REPORT EXHIBIT A CONTROL BLOCK: l l l l l l lh (PLE ASE PR;NT OR TYPE ALL REQUIRED INFORMATION)

I 6

lo lil l AlR l Al Nl 0 l plgl 0 l0 -l0l0l0l0l0-l0l0lg4 1 l 1l1 l 1lgj j lg 1

8 9 UCEN1Et CODE 54 15 UCENSE NuveER 25 26 LIC L N>E tvPE J0 63 C A T be CON'T

"'l % LL_J@l0 i s p l0101316 I 8@l 01 110 71810@l 01 Pill si R I nl@

o i

7 8

60 61 DOCKET NUM8tm 68 69 EVENT DATE 74 75 HFFORT OATE 80 EVENT DESCRIPTION AND PROB A6LE CONSEOUENCES h lo 121 I During Mndo 1 nnovatinn "R" rnre Prntactinn ralculatnr(CpC) failed o

3 I Channel "B"

DNBR and LPD trips were bvoassed placina the Reactor Trio I loqic in a 2 out of 3 trio secuence.

All remaining CPC channels were i

o A

Ir Isl verified to be coerable.

Similar to LERs 50-368/79-045 & 79-098.

I o

e i Renortable nor T.S.6 9.1.9.h-I o

i I f

I l

c e

SE'

'c^cTE su'eci$$E

  • .u7$1t wTPos C

tou oNENT cOut IT R I I I A l@ LEJ@ E_J @ l I I NI S l Tl PJ U l@ LYj@ L_Z_J @

y et 9

to 11 12 13 is tS 20 SE CUE N fi AL OCLUE S T *nCI REPOHf REVIIlON

@ :gg e.g '=,;

I O ln I L-J I n i ni a 1 L.cj in i 11 LLJ L-J LQJ O

EVENTf(aR REPORT NO CODE YvPt

  • < O

_2 n 22 23 24 20 27 78 M

20 31 31 TextN ACT ON PLA Y M Ti 00 HOyR$

$ B T C 5 0"

  • L'!*

SUPP t VAN FACT RER LEJ@l.ZJ@

LZJ@

L7J@

10 101 010 Ulj@

LILJ@

Llij@

l Cl 419 i O l@

33 34 35 36 33 40 41 42 43 44 en pTICN ANO CORRECnVE ACTIONS h C AUSE DESCRi i

o i Fvart canco nf failuro ennld nnt ho determinod Comhustinn Fnainspring i ii li 1 i is devel onirig sof twarp for the CPC's to aid in failure diagnostics.

"R"I li12i i CPC was restarted and returnod te service within 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> noeting the I

i a l rponiremonte nf T 9. Tahlo 1.1 1 Action Statement EP.

I L, LL*.J l I

STA 5

% POWER OTwf R $T ATUS Da5C v HV C'% COVE MY DESCHi8 TION [LJ@ In I si d@l NA I [A.j@l NA j

i s

a e

0

' J1,,, T. C#Ti~T 8'(Lf A$ E D OF RELE ASE AMOUNT OF ACTivlTY t oL a rON OF REL E ASE W @ [LJ@l NA l

l NA l

i c

,E NsOsNEl E,,es " Es a

RO DEscRPT.O~@

Nuo.ER 1,E 10101 Di@Ej@l NA l

i i

E RsONs.'L,Na',E s sn D E s CR,, T IO~@

NUv ER 101 0101@l NA l

i 7

8 9 11 17 80 LOs; OF OR OAwACf TO FaClury Yvet DESCR'PfiON lilOfLz_J@l NA l

7 A 9 to Bd DV8 LICI T Y 155Uf D DE SC R

  • P T I ON NRC USC ONLY L2.LoJ LEJ@l NA j l;;;;;;;;,;;;

Rex Pendergraft 5di/968-2519

.,,,0y,

A EOg,R,,,n n 8002200 '-5 O