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Regional Basic Professional Training Course in Korea

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is to place the plant <strong>in</strong> a safe, stable condition.<br />

16.2.5. Functional Recovery Guidel<strong>in</strong>e (FRG)<br />

❙ 901 ❙<br />

16. In‐Plant Accident Management<br />

FRG is implemented follow<strong>in</strong>g a reactor trip <strong>in</strong> which the event cannot be diagnosed by<br />

the operators. It may also be implemented for cases where the operators have <strong>in</strong>itially<br />

selected an ORG but subsequently discovered that they had misdiagnosed the event or<br />

that the ORG was not adequately ma<strong>in</strong>ta<strong>in</strong><strong>in</strong>g safety functions.<br />

Enter<strong>in</strong>g the FRG, the operator reviews the status of all safety functions by check<strong>in</strong>g<br />

control board <strong>in</strong>dication aga<strong>in</strong>st the acceptance criteria. He focuses on the jeopardized<br />

safety functions first and completes the appropriate <strong>in</strong>structions for the jeopardized safety<br />

functions, then the <strong>in</strong>structions for those determ<strong>in</strong>ed to be challenged and then cont<strong>in</strong>ues<br />

to verify that the satisfied safety functions rema<strong>in</strong> satisfied.<br />

16.2.6. Validation and verification<br />

Verification is the evaluation performed to confirm the written correctness of the EOP and<br />

to ensure that the generic and/or plant specific technical aspects have been properly<br />

<strong>in</strong>corporated. Validation is the evaluation performed to determ<strong>in</strong>e whether the actions<br />

specified <strong>in</strong> the EOP can be followed by tra<strong>in</strong>ed personnel while manag<strong>in</strong>g the <strong>in</strong>cident or<br />

accident situation. There are numerous means to assess the technical adequacy of an EOP ;<br />

Computer codes are used to give the plant response to a particular transient.<br />

Operator’s actions can be <strong>in</strong>putted <strong>in</strong>to the code. Depend<strong>in</strong>g on the degree of code<br />

qualification and real time capability, the results of the computation are used for

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