JPM RO-A1 — Perform a Manual AFD Calculation
Admin | RO/SRO | G2.1.25 (3.9)
Location: Classroom
Time-Critical: No
Alternate Path: No
Estimated Time: 10 minutes
Initial Conditions:
- Salem Unit 2 completed a down power to 73% power today at 0830 IAW TSAS 3.1.3.1.c.3.d due to a single control rod being declared inoperable.
- The AFD Monitor Alarm for the Auxiliary Annunciator was determined to be inoperable at 0840.
Initiating Cue:
- You are the Reactor Operator.
- The CRS directs you to perform a manual AFD calculation IAW Section 5.3 of S2.OP-ST.NIS-0001 (Q), Power Distribution — Axial Flux Difference.
- Current AFD Channel Console Readings are:
Channel I: -9.8
Channel II: -9.7
Channel III: -10.3
Channel IV: -10.5
- All prerequisites are completed SAT.
- NOTIFY the CRS of the results of the surveillance after completing Step 5.3.1.F.
Time-Critical: No
Alternate Path: No
Estimated Time: 10 minutes
Initial Conditions:
- Salem Unit 2 completed a down power to 73% power today at 0830 IAW TSAS 3.1.3.1.c.3.d due to a single control rod being declared inoperable.
- The AFD Monitor Alarm for the Auxiliary Annunciator was determined to be inoperable at 0840.
Initiating Cue:
- You are the Reactor Operator.
- The CRS directs you to perform a manual AFD calculation IAW Section 5.3 of S2.OP-ST.NIS-0001 (Q), Power Distribution — Axial Flux Difference.
- Current AFD Channel Console Readings are:
Channel I: -9.8
Channel II: -9.7
Channel III: -10.3
Channel IV: -10.5
- All prerequisites are completed SAT.
- NOTIFY the CRS of the results of the surveillance after completing Step 5.3.1.F.
Task Standard:
1. Completes applicable portion of Attachment 3 of S2.OP-ST.NIS-0001, and determines Channel III and IV are operating outside the AFD Target Band.
1. Completes applicable portion of Attachment 3 of S2.OP-ST.NIS-0001, and determines Channel III and IV are operating outside the AFD Target Band.
▶ Show Critical Steps & Key Actions
| Step | Critical Element | Standard |
|---|---|---|
| 5.3.1 | IF AFD Monitor (XA-8740) OR Monitor Alarm (Auxiliary Annunciator) is inoperable, THEN COMPLETE Attachment 3 | Operator uses Attachment 3 to determine AFD. |
| 5.3.1.A | ENTER present Reactor Power | Operator enters 73% power. |
| 5.3.1.B | ENTER AFD Target from S2.RE-RA.ZZ-0011, Tables, Table 3 | Operator enters (-1.5) for AFD Target using the Salem 2 Cycle 23 REM, Table 3. |
| 5.3.1.C * | CALCULATE the AFD Target value IAW (Present Power / 100) x (AFD Target) | Calculates AFD Target for present power level: (73/100) x (-1.5) = -1.095. IAW P&L 3.2, round to first decimal place = -1.1. |
| 5.3.1.D * | DETERMINE Upper and Lower Limits using Target Band values from REM Table 3 | Upper Limit: +6.0 + (-1.1) = +4.9. Lower Limit: -9.0 + (-1.1) = -10.1. |
| 5.3.1.E | ENTER AFD Channel Readings | Enters AFD values from initial conditions on Attachment 3: Ch I: -9.8, Ch II: -9.7, Ch III: -10.3, Ch IV: -10.5. |
| 5.3.1.F * | DETERMINE channels within/outside AFD Target Band and notify CRS | Determines Channels III (-10.3) and IV (-10.5) are operating outside the Lower Target Band limit of -10.1. Notifies CRS of results. |
Key Decision Point:
Step 5.3.1.F is the discriminating step. After calculating the AFD Target (-1.1) and determining the Lower Limit (-10.1), the applicant must compare each channel reading against the limits. Channels I (-9.8) and II (-9.7) are within the band. Channels III (-10.3) and IV (-10.5) are MORE NEGATIVE than the Lower Limit of -10.1, placing them outside the target band. With two AFD channels outside the target band, TS action is required to reduce reactor power.
Step 5.3.1.F is the discriminating step. After calculating the AFD Target (-1.1) and determining the Lower Limit (-10.1), the applicant must compare each channel reading against the limits. Channels I (-9.8) and II (-9.7) are within the band. Channels III (-10.3) and IV (-10.5) are MORE NEGATIVE than the Lower Limit of -10.1, placing them outside the target band. With two AFD channels outside the target band, TS action is required to reduce reactor power.
Ref: S2.OP-ST.NIS-0001 (Rev 13), Salem 2 Cycle 23 REM (Rev 17), Salem Unit 2 COLR Cycle 23 (Rev 7) | Task: N0150010201 | K/A: G2.1.25 — Ability to interpret reference materials, such as graphs, curves, tables, etc. | Source: New | View JPM PDF
Connections
- Related systems: Excore NIs
- Related procedures: S2.OP-ST.NIS-0001 — Power Distribution AFD Surveillance
- Related tech specs: TS 3/4.2 — Power Distribution, TS 3/4.1.3 — Movable Control Assemblies
- Related exam: 2018 NRC Operating Exam