05000322/LER-1986-009, :on 860217,during APRM Functional Test,Full Reactor Trip Occurred.Caused by Technician Failure to Reset Reactor Protection Sys Trip Signal a Before Initiating Test of Logic Train B.Procedures Being Reviewed

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:on 860217,during APRM Functional Test,Full Reactor Trip Occurred.Caused by Technician Failure to Reset Reactor Protection Sys Trip Signal a Before Initiating Test of Logic Train B.Procedures Being Reviewed
ML20141N951
Person / Time
Site: Shoreham File:Long Island Lighting Company icon.png
Issue date: 03/14/1986
From: Grunseich R
LONG ISLAND LIGHTING CO.
To:
Shared Package
ML20141N947 List:
References
LER-86-009, LER-86-9, NUDOCS 8603180334
Download: ML20141N951 (3)
v • d • e


LER-1986-009, on 860217,during APRM Functional Test,Full Reactor Trip Occurred.Caused by Technician Failure to Reset Reactor Protection Sys Trip Signal a Before Initiating Test of Logic Train B.Procedures Being Reviewed
Event date:
Report date:
3221986009R00 - NRC Website
v • d • e

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St.oreham L.cliar Power Station 1.' nit #1 e p 10 lo e l 3l2 l 2 8l6 0l0 Og2 op 0 l3 0 l0 l9

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1906 at 0304, a Ful1 Heactor Trio occurred aue to s we e t cr error.

The oiant was in Doorational Condition 5, with t ht-not' a ew t t c h in Ehuccown and all rodn inserted in the core.

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A furctional t en* of the Ave *apo power Range Monitor (APRM) Logic wan t.v i r ; perfortod by Nuc16ar Annistant Station Doerators (NAGO) m i r.a Cte. tion Deocorb re 24.604.01 to catinfy Technical i

Env.iflcation re 7 u i rerne n t 1.

Th is functional teot requires the ope rn t o.- to incert 1/P 'leactor Trip nignals into the RPS Lonic at varions t i'nn u n o m.

to fully tent the circuitry.

The test alno esta u t rw that the ADAM channels which serve the "A"

Reactor Drot e c t ior=

by t.t err (PPG) Lootc train t n..

tested prior to tentina tho29 w. i ch urve the "D"

Lncic train.

1/2 trio Gignalc I

i rmert eti into t o rr

'O' Locle train are uubseouently recet within

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the orccudure, orter to boninnine the "D"

Logic train.

In thin c at v, an oper a t or had xic o l v t ed che "A" Loalc train and au he i

t>o g a re to innert +hn first 15%

t, t e na l into the "B"

nPRM in the

'b" Logst t ra i n, a Full Aatto-Tri o ot: curred.

The onorator 1 wn d s a t o '. y

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  • the "D"

Loaic trip siunal and estn u t the "D"

Lo it when t h r* ueennd onorator dialed dowi. che 15% trio uinnal ontheGDW.

Dcth ocer:rcor. involved

".tated that thov obe,orved 1

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i that the 1/i2 t-in i, the "n"

t-ain wan recot at two socarate locations.

T $. a s i rcur,s n t r: ncy orompted the Watch Enoineer to wthorin tne individuo3c to a t t orno t to recreato the event no as

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to we if an euuip ent r r n b is"rn was the caune.

Th i s wan a t t ornot t'd

twice, wtt* to o lotte nerf orot rm ac deoioned both t i ronn.

Upon further inv W iet': on of the ment, it wan de t nerni ned f rora thn En?CUence D V e n t *,

b e i n t o o l, that t h t?

Sporator had ncit i

wacteufully rowt ths "H"

ap5 1/2 trio nignal an he bonan the "D"

6Dah, T h ta r p wat no emfet/ c. i ri r a f i r.inc e to tbe event.

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Upro challonged or PVQ u i r et s f ", * -

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Operalcon ci,rriffd out all rugettypd c Jr'r P C t I VT1 ACh1Cn5.

O l a r.t MaPla n ernt, n t was r Qt i find of thO Ovent afd t bo NHC w. rac. i r. ed at 0%D one 10CF'HLO. 72.

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  • .-- m...m To brevent recurrence, the following corrective actions have or will be taken:

1)

The noerators responsible for causing this event will be recuired to review the procedure and deterrnine if it can be rnod i fied at all to prevent a future occurencu.

In addition, they will be required to update the procedure

wording, to accurately rufluct the a l a rnt typor's printout for each cornputer phroue called out during the curveillance.

2)

The Cornout er Section will be requested to evaluatu the pc.uu i b i l it y of having the secuence cornouter list the alarrns on the CRT an well ao on the typer. This will allow the perforraance of the surveillance without an operator i

dedicated to the typor.

3)

A copy of the Final Incident Report will be placed on reauired readina for all Operations pornonnel.

4)

The I nst r utnan t and Controln Section has been dirneted to invustigate whether this RpS actuation could have buen caunod by an equiprount rna l f unct i on.

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