ML14115A266

Evaluation of Emergency Procedures for San Onofre Nuclear Generating Station,Preliminary Rept

ML14115A266
Person / Time
Site:	San Onofre
Issue date:	12/10/1980
From:	XYZYX INFORMATION CORP.
To:
Shared Package
ML14114A613	List: ML14114A612 ML14115A266 ML19340D372
References
S231C.80.18, NUDOCS 8012300450
Download: ML14115A266 (27)

Text

EVALuATIONd OF iEMaRGENC PROCEWJABS FOR SNONOFRIE NUCLUAR GNEWA1NO STATION, PRELIINARY REOR M44o 7MO Norfol AvGMjs 4

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BullS FOR :BVAWA?!OU OF 3NUgagCT OCi: M SiTS OF 89 LUATXO CRITBRIA There are four bati sedtsoproperties that determine the ad equacy of an emergency procedure. They are cogleteness and accuracy, presentation style, level of detail and administra tive control.

ComIotenose and accuracy are technical properties.

They re Ter to the extent to waich required actions are covered with out errors of.aasion, sequence, or detail fact. evaluation of these properties is outside the scope of the present et fort.

Completeness and accuracy must be checked by personnel familiar with the specific characteriseics of the object system.

Prosentation style is a human factors property that can be eVal U.fate without knowledge oft the Iobjeact system.* Presen tation style involves factors that affect the operator's codnirohonsion of the iesage being delivered. Those factors are based on established principles of information transfer that apply to all procedures of any kind. Presentation style is covered i' this evaluation.

Lovol of dotail refers to the dogree of guidance provided beyo5 i TheTidentification of essential actions. Such deta il normally is espressed in terms of "ow-to* steps and point locations. The need for "hov-tog and point location data is aboolute. There is no, way the operator can function without te. owever, that need is sometimes satisfied by the fact that the operator already holds the data in his memory.

Where he does, detailed procedures are of limited use (except in traTiiTilg).

Where he'does not, detailed procedures are essen tial.

In this evaluation, the lattot condition is presumed to exist. The rationale for that presumption is summarized later in the discussion.

Administrative control refers to other properties of impor tance to the procedure user. It includes provisions for:

ac cess, denotation of identity and revision status, and verifi cation of completed work by the user. Those aspects of admin istrative control are coveree by this evaluation.

In some plants, administrative control is also used to qovern the pro cedure development process.

That aspect is not covered here.

The procedure development process is extremeTyimpottant but its evaluation lies beyond the scope of the present study.

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eactiono li0 in arbitrary (30 quoncoo. Othpir~o aire of a diagnoatic oie eqiig.

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ftho 13, t not, 00oif-ovi'dent An t 0 physlcal Gotructsfro.of. the, hordwore*

That ia, the -ca~ple-.

1 tio.2'0n atin'tyicl.y.fuAL ano clue todingl the.action n-est t* roquird, The t ok ioa cc~oniod,'y-04o a tro 9h'nuh to.d i fupt humcm bohavior.% such, diorujptioKn'd to i creaoe the 1lik1lihodj :0 pipplator Orofro 4".. SOQao oparator, error;, areLovorob~.ol otheroae

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"EIUI rto~k. I^o2ver, in' the Qontfa anR yoa 'a folloulnq bo~e ranigoparator akill'o rlative to this oo eo'CCn be expected to docoy, ifeuth r pete Is o received on~~

- ididcboo atatho operato will qgradual-4 ly forgOt, what to do and how* to do.1t, Sufficient prac tice typiczally, 40, nt beein providold in, the -paot.0 6.The &bitity of'.the opeator.to. carry out' this: took Offec-'

tively vill be'furither' Wuooded it the control paneld are not marked to 'help him locate key Inatrtents quickly and.

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SPUCIFIC CItBRIA Specific criteria for evo qa given set of LAA proe.

dures are presented here in rt.

All are in the form of checklists. The fit three ckit correepond to the three properties discussed earlier:

presentation style level of detail, and dministrative control. The foutth checklist provides for a walk-through of the procedures.

All four checklists are designed to n

yes answers for acceptable conditionsead '"'no answers tor conditions that are not acdeptable.

Zn actual use, each checklist is acces panied by an explanation and/or 'illustration of every 'to' answer.

Most questions can be anawered by reference to the'proce*

dures themselves.

Thess questions are marked DOCUNEN.

Som require direct contact with the plant.

-Those questions are marked SITE.

Most of the questions he straightforvird in nature and re quire no explanation, except for Questions 6 and 7 on Check list i1.

Questions 6 and 7 provide an opportunity to verify by inspection the condition of the control panels and the pyactice schedule. The answers to these questions can be used to help determine the urgency of the need for step level instructions and 0ontrol/Lndicator location data in the LOCA procedures.

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Checklist IV provides one final opportuity to gauge the adequacy of the LOCA procedures wthin the context of the existing operator skill levels and control panel d*sign.

In applying Checklist IV it is important to observe all the stated precautions.

Otherwise, an erroneous con custon might be drawn tegarding procedure quality.

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A,. MOniarative -control: dofiLciaties concern P"W, Identification data and provigions for veri f icatton.

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.Oftfre.

1.ReviLae the jocodur~i8 Ir twed h e t e1~nat h

'Aficiencies noted :thus 9040-.

9 pcif tea are ILsted below.

A (IMac~~e. L&au'uct ons.

are curreftly'preoonted in, POrcGVQUh tora,# reduce'thou to shtort#

concise, identifible,.steps.,

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gav toe the instructions, to thOat -the -atverage nuaber -Of action pr stp is less than" 1.5.

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b~~ed n core tan WO variableo roran the copy Co 03, to Qtci it cloarer'.

UQe t~u~areo~at l~nri~4deirod actioneo sto referances3 to0 05eciic, indicationts or grup of indications.:

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Rc~~e all moand statement@

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actions, to, COPe with all-IooqLeal.

contingencies'.

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