JPM RO-A3 — Determine Personnel Exposure and Special Requirements
Admin | RO/SRO | G2.3.4 (3.2)
Location: Classroom
Time-Critical: No
Alternate Path: No
Estimated Time: 15 minutes
Initial Conditions:
- Salem 1 is at 100% power.
- A Locked Valve surveillance IAW S1.OP-ST.CAN-0001, Primary Containment Valves Monthly, is scheduled to be performed on your shift.
- One of the valves to be verified is located in the Unit 1 Pipe Alley, Elevation 84 ft, Auxiliary Building.
- An entry into the Pipe Alley has been made since the last performance of this surveillance requiring this valve position to be verified.
Initiating Cue:
- You are the Unit 1 RO and have been assigned to perform the valve verification in the Unit 1 Pipe Alley.
- Using the provided Radiological Survey Map and procedures, determine the following:
1. What is the Radiological Posting for the area that the task will be performed?
2. What is the highest On Contact radiation dose rate?
3. What is the highest General Area dose rate?
4. What protective clothing is required to enter this area?
5. Calculate your personnel dose exposure. Assume the following:
- It will take 1 minute to complete the task
- Use the highest On Contact radiation dose rate as the General Area dose rate for the room
Time-Critical: No
Alternate Path: No
Estimated Time: 15 minutes
Initial Conditions:
- Salem 1 is at 100% power.
- A Locked Valve surveillance IAW S1.OP-ST.CAN-0001, Primary Containment Valves Monthly, is scheduled to be performed on your shift.
- One of the valves to be verified is located in the Unit 1 Pipe Alley, Elevation 84 ft, Auxiliary Building.
- An entry into the Pipe Alley has been made since the last performance of this surveillance requiring this valve position to be verified.
Initiating Cue:
- You are the Unit 1 RO and have been assigned to perform the valve verification in the Unit 1 Pipe Alley.
- Using the provided Radiological Survey Map and procedures, determine the following:
1. What is the Radiological Posting for the area that the task will be performed?
2. What is the highest On Contact radiation dose rate?
3. What is the highest General Area dose rate?
4. What protective clothing is required to enter this area?
5. Calculate your personnel dose exposure. Assume the following:
- It will take 1 minute to complete the task
- Use the highest On Contact radiation dose rate as the General Area dose rate for the room
Task Standard:
1. High Radiation Area (HRA), Contaminated Area (CA)
2. 205 mrem/hr
3. 10 mrem/hr
4. Protective Clothing: lab coat, booties and rubber gloves
5. 3.42 mrem (if rounded up 3.5 is acceptable)
1. High Radiation Area (HRA), Contaminated Area (CA)
2. 205 mrem/hr
3. 10 mrem/hr
4. Protective Clothing: lab coat, booties and rubber gloves
5. 3.42 mrem (if rounded up 3.5 is acceptable)
▶ Show Critical Steps & Key Actions
| Step | Critical Element | Standard |
|---|---|---|
| 1 * | Determine radiological posting for the work area | Refers to Radiological Survey Map #1108410 and determines the work area is in a High Radiation Area (HRA) and Contaminated Area (CA) |
| 2 * | Determine highest On Contact radiation dose rate | Refers to Survey Map and determines highest On Contact dose rate is 205 mrem/hr. (RP-AA-300, Attachment 2 provides definitions of survey map symbols.) |
| 3 * | Determine highest General Area (GA) dose rate | Refers to Survey Map and determines highest General Area dose rate is 10 mrem/hr |
| 4 * | Determine protective clothing requirements | Reviews HRA Briefing Sheet and determines Protective Clothing required: lab coat, booties, and rubber gloves for entry into CA |
| 5 * | Calculate personnel dose exposure | [205 mrem/hr x 1 hr/60 mins] x 1 min = 3.42 mrem (round up to 3.5 mrem acceptable) |
Key Decision Point:
Step 5 is the discriminating step. The applicant must use the highest On Contact dose rate (205 mrem/hr) as the General Area dose rate per the initiating cue, then calculate the dose for a 1-minute exposure: 205 mrem/hr / 60 min/hr x 1 min = 3.42 mrem. The trap is to use the General Area dose rate (10 mrem/hr) instead of the On Contact rate as instructed. The HRA Briefing Sheet includes a dose rate alarm setpoint of 250 mrem/hr (increased from 205 to avoid conflict with the survey map dose rate) — the applicant should not confuse this alarm setpoint with the actual dose rate.
Step 5 is the discriminating step. The applicant must use the highest On Contact dose rate (205 mrem/hr) as the General Area dose rate per the initiating cue, then calculate the dose for a 1-minute exposure: 205 mrem/hr / 60 min/hr x 1 min = 3.42 mrem. The trap is to use the General Area dose rate (10 mrem/hr) instead of the On Contact rate as instructed. The HRA Briefing Sheet includes a dose rate alarm setpoint of 250 mrem/hr (increased from 205 to avoid conflict with the survey map dose rate) — the applicant should not confuse this alarm setpoint with the actual dose rate.
Ref: RP-AA-460 (Rev 19), RP-AA-463 (Rev 5), RP-AA-300 (Rev 6) | Task: 1200100104 | K/A: G2.3.4 — Knowledge of radiation exposure limits under normal or emergency conditions | Source: New (Rev 01) | View JPM PDF
Connections
- Related procedures: RP-AA-460 — Controls for High and Very High Radiation Areas, RP-AA-300 — Radiological Survey Program
- Related exam: 2019 NRC Operating Exam