ML21356B726

ES-401-4

ML21356B726
Person / Time
Site:	Byron
Issue date:	10/28/2021
From:	Gregory Roach NRC/RGN-III/DRS/OLB
To:
Roach G
Shared Package
ML21055A847	List: BYRON 2021-0072, Post Exam Submittal Letter ML21356B724 ML21356B725 ML21356B726 ML21356B727 ML21356B732 ML21356B733 ML21361A021 ML21361A029
References
Download: ML21356B726 (2)

Text

ES-401 Record of Rejected K/As Form ES-401-4

Tier / Randomly Reason for Rejection Group Selected K/A 1 / 1 065.AA2.05 Revision of Byron Station procedures has removed direct Q15 Ability to reference to IA pressure for commencement of plant determine and shutdown or RX trip. OA procedure monitors operation of interpret the RCP parameters to determine required actions for plant trip.

following as they Procedure actions are too similar to RCP functional criteria to apply to be discriminating between IA response and RCP abnormal the Loss of response for RX trip.

Instrument Air: Add KA to suppression list When to commence plant shutdown if Suggested replacement KA instrument air 065AA2.08 - Ability to determine and interpret the following pressure is as they apply to the Loss of Instrument Air: Failure modes of decreasing air-operated equipment as a replacement 2.9 / 3.3 Importance Factor: 3.4* / 4.1 Use of this KA will maintain exam integrity, point totals, being the same system, category, group and tier.

Tier 3 2.1.45 Byron Station was unable to develop an operationally Q 68 Ability to identify valid and discriminating RO level question sufficiently and interpret generic to meet the KA.

diverse Suggested replacement KA indications to validate the 2.1.7 Ability to evaluate plant performance and make response of operational judgments based on operating another characteristics, reactor behavior, and instrument indication. interpretation Importance 4.4 / 4.7 Factor: 4.3 / 4.3 Use of this KA will maintain exam integrity, point totals,

category, group and tier.

ES-401 Record of Rejected K/As Form ES-401-4

1/2 000067 (APE 67) Byron Station was unable to develop an operationally Q 84 Plant Fire On Site valid and discriminating SRO level question to test the

/ 8 impact of Plant Fire on the ability to determine G2.2.37 - Ability operability or availability of safety related equipment to determine without the use of multiple references, direct lookup, or operability discriminating distractors.

and/or Suggested replacement KA availability of safety related WE01 & E02 Rediagnosis & SI Termination G2.4.1 equipment. Knowledge of EOP entry conditions and immediate Importance action steps.

Factor: 3.6 / 4.6 4.6/4.8

Use of this KA will maintain exam integrity, point totals, category, group and tier.