Reactor Coolant System

Question 1

What are the 3 purposes of the Reactor Coolant System (RCS)?

Answer 1

transports the thermal energy from the core to the S/G’s,
2nd barrier to fission product release,
moderates and absorbs neutrons

Question 2

Describe the location and purpose of: Reactor vessel

Answer 2

the portion of the RCS designed to interface w/ the 4 loop design to contain the fuel & support components necessary to contain & control the nuclear chain reaction.
located in the center of the major RCS components

Question 3

Describe the location and purpose of: Steam generator

Answer 3

interface between primary & secondary where heat transfer from Reactor Coolant to Feedwater takes place.

Question 4

Describe the location and purpose of: Reactor coolant pumps

Answer 4

motive force for coolant flow through the Core & RCS Loops, located adjacent to the SGs inside the loop rooms

Question 5

Describe the location and purpose of: Pressurizer

Answer 5

to allow the RCS to moderate the neutrons for a self-sustaining nuclear chain reaction & transfer the reaction generated heat, located in containment on the 24’6” elevation south of the Rx Vessel in an enclosure

Question 6

Describe the location and purpose of: Loop isolation valves

Answer 6

motor operated dual-disc gate valves that isolate of the loops from the Reactor Vessel.

Question 7

Describe the location and purpose of: Loop bypass lines

Answer 7

provides the minimum pump flow requirements for starting & running an RCP in an isolated loop w/out overheating.
Located between each HL and CL.

Question 8

Describe the location and purpose of: Reactor vessel head vent

Question 9

Describe the location and purpose of: Disc pressurization sub-system

Answer 9

to relieve any pressure buildup between the discs to preclude valve operation difficulty

Question 10

Describe the location and purpose of: Pressurizer spray valves

Question 11

Describe the location and purpose of: Pressurizer heaters

Question 12

Describe the location and purpose of: Pressurizer safety valves

Question 13

Describe the location and purpose of: Pressurizer power operated relief valves (PORV)

Answer 13

assist spray flow in RCS pressure control below the High Press

Question 14

Describe the location and purpose of: Pressurizer Relief Tank (PRT)

Answer 14

located under the Pzr on the Ctmt -24’6” elev