ROA Written Assessment #1

R

Roentgen; unit of exposure. 1R = ~2 × 10⁹ ion pairs/cm³ or (2.58×10^-4 C/kg of air) of dry air at STP

RAD

Radiation Absorbed Dose; unit of measuring energy absorbed from any radiation into a unit of mass (6.2 × 10⁷ MeV/gram)

REM

unit of biological dose equivalent; REM = QF * RAD

Dose limit for the public

100mREM/year or 2 mREM/hr

Stochastic effects

Probability of effect increases with dose (e.g. cancer, genetic mutations)

Non-Stochastic effects

Severity increases with dose (e.g. burns, ARS)

QF of gamma and x rays

1

QF of β^-

1 - 1.7

QF of thermal neutrons

3

QF of fast neutrons

10

QF of heavy ions

20

Radiation area

Accessible area where radiation levels could give a person greater than 5 mrem in one hour at 30cm from the source or surface of shielding

High radiation area

Accesible area where radiation levels could give a person a dose greater than 100 mrem in one hour at 30 cm

Very high radiation area (grave danger)

accesible location where external radiation levels are intense enough to give an absorbed doze greater than 500 rads in one hour @ 1 meter from the source

Whole body dose limit for radiation workers

5 REM

Eye dose limit for radiation workers

15 REM

Extremity dose limit for radiation workers

50 REM

ALARA

As Low As Reasonably Achievable; risk mitigation philosophy commonly associated with exposure control

Simple dose minimization

Time, distance, shielding

Number of fuel assemblies

25 fuel assemblies

Fuel box material

Zircaloy-2

Fuel box outside dimensions (in.)

2.740 × 3.15

1

PuBe Startup Source Holder

2

Pneumatic Transfer System (PN) Terminus

3

Flapper Limit Switch & Actuation Extension

4

Flapper Limit Switch Lever

5

Flapper

6

Fuel Assembly

7

Outlet Plenum

8

Source Range Channel/Neutron Flux Monitor (NFM)

9

Log-N Linear Channel (LogN)

10

Linear Channel

11

Safety Channel

12

Reflector Assembly

13

Control Rod Guide

14

Fuel Assembly

15

Grid Plate Extension

16

Rotating Exposure Port Location

17

Old Fission Chamber (not in use)

18

Pneumatic Transfer System (PN) Terminus

19

PuBE Startup Source Holder (in-core position)

20

Flapper Limit Switch

Fuel enrichment

4% or 6%

Control rod absorber material

Ag-In-Cd (80%, 15%, 5%)

Shape of control rods

Rectangular

Control rods absorber dimensions (in.)

4.85 × 0.18

Number of control rods

3

Number of non-scrammable rods

1

BT1

Fission Gas Measurement Loop Facility

BT2

Empty

BT3

Empty

BT4

Neutron Diffractometer

BT5

Neutron Imaging Facility

BT6

Positron Intense Beam Facilities

Flow path of primary coolant

Core —> ¹⁶N Delay tanks —> Primary pump —> Heat exchanger —> Cooling tower

Purpose of ¹⁶N delay tanks

Allows for the decay of ¹⁶N in a sheilded vault prior to emerging in the Mechanical Equipment Room (MER)

Control room area monitor evac level

5 mR/h

Over-the-pool area monitor evac level

100 mR/h

West wall area monitor evac level

100 mR/h

Stack Gas effluent monitor evac level

5000 AEC-⁴¹Ar

Stack Particulate effluent monitor evac level

5000 AEC-⁶⁰Co

Level 1 Organization

Administration: Chancellor, engineering dean, nuclear engineering dept. head

Level 2 Organization

Facility management: NRP Director

Level 3 Organiaztion

Manager of Engineering OperationsLev

Level 4 Organization

Operating and Support Staff

Role in organization that is independent of hierarchy

Reactor Health Physicist

4 roles comprise minimum staffing

Reactor operator (or senior reactor operator), ROA, designated senior reactor operator (DSRO), reator healthy physicist

Distance for ROA

5 minutes upon request

Distance for DSRO

30 minutes or 15 mile radius

Radiation Safety Committee

Makes sure use of radioactive material is in compliance wit state and federal regulation and NRC

Reactor Safety and Audit Committee

Ensures PULSTAR is operating correctly and adhering to technical specifications and rules of NRC

Tried experiment

Experiments that have been previously performed at this reactor

Recoards that need to be retained for at least 5 years

normal operations and maintence, repoertable events, surveillance activites, experimentation, changes to procedure, radiation and contamination surveys, audit summaries, RSC and RSAC meeting minutes

Recoards that need to be retained for facility lifetime

gaseous and liquid waste effluent records, off-site environmental monitoring surveys, radiation exposures for monitored personnel, fuel inventories and transfers, and drawings of the reactor facility