Trantham_M1.3

docx

School

Excelsior University *

*We aren’t endorsed by this school

Course

246

Subject

Mechanical Engineering

Date

Apr 3, 2024

Type

docx

Pages

Uploaded by BarristerQuetzal3979

Course: Thermal Measurements Lab Section: Module 1 Instructor Name: Dr. Pashayi Name(s): Carlton Trantham __________________________________________________________________________ Title : In this lab, we measured various plant parameters to calculate the amount of sub-cooling within the primary coolant loop, as well as the amount of condensate depression within the condensate system. __________________________________________________________________________ Abstract: Ensuring the primary coolant remains sub-cooled within the reactor vessel is of vital importance in a Pressurized Water Reactor. Using the Reactor Vessel inlet pressure, and the corresponding saturation temperature, we can compare this value to the Reactor Vessel inlet temperature to determine the amount of sub-cooling. Condensate depression ensures that the condensate pumps will not experience cavitation while supplying condensate to the feed system. This value is determined utilizing the same process except while comparing condenser pressures and the temperature of the condensate discharge. __________________________________________________________________________ Introduction: A sub-cooled liquid is defined as a liquid below its saturation temperature for a given pressure. Sub-cooling various liquids is required for proper plant operation in many different locations within a reactor plant. It is required to ensure that only liquid is present in the reactor vessel of a boiling water reactor or to ensure there will be no cavitation in the condensate pumps. Ensuring only the necessary amount of sub-cooling can also have a major impact on the efficiency of the plant. Operators must ensure they are aware of their actions and how they can impact the sub- cooling of these various liquids. The focus of the lab is to become familiar with the plant parameters and to calculate the amount of condensate depression and the degree of sub-cooling of the primary loop. __________________________________________________________________________ Methods: Navigate to the RCS1 page and record the values for one hot leg temperature and the RV Inlet pressure. You will need to convert the pressure to absolute pressure by adding 14.7 to the indicated gauge pressure. Then utilizing the saturated steam table page, you will find the

saturation temperature of the liquid in the reactor vessel. Subtract the saturation temperature from the hot leg temperature that was recorded, and you have found the degree of sub-cooling. Next to find the amount of condensate depression, navigate to the CON1 page and record the values of the three condenser pressures. These values will need to be converted to absolute pressure as they are shown in inches of mercury. This is done by dividing the indicated pressure by 2.036. Next record the three condenser temperatures listed above those pressures. Utilizing the HP Condenser pressure and the steam table page, calculate the saturation temperature. Then when subtracting the saturation temperature from the condensate pump discharge temperature, you find the amount of condensate depression. ________________________________________________________________________ Results: 12. a. RV Inlet: 2300.3 12. b. RV Inlet psia: 2315.0 13. Hot Leg Temp: 617.6 F 16. Saturation temptation for RV Inlet: 656.89 17. Degree of sub-cooling: 39.29 F 18. Recorded sub-cooling: 37.2 F 19. The temperature gradient will vary drastically from the center of the core outward. Reactivity near the center of the core will increase as well causing higher temperatures when compared to the outer fuel cells. I also utilized the warmer of the two hot legs during the initial calculation, which would have yielded a different degree of sub-cooling after subtraction. 22. LP Cond: 114.7 F IP Cond: 116.5 F HP Cond: 122.6 F 23. LP Press: 0.776 psia IP Press: 0.903 psia HP Press: 1.321 psia 24. Cond Sat Temp: 111.18 F 25. Cond Pump Disch Temp: 102.2 F 26. Cond depression: 8.98 F __________________________________________________________________________ Discussion : The results indicate that with a certain degree of accuracy, the plant can accurately calculate the degree of sub-cooling in the primary loop. The simulator also shows the importance of

calculating the amount of condensate depression to ensure that the efficiency of the plant is maintained. __________________________________________________________________________ Conclusion: In conclusion, I learned that the degree of sub-cooling is an incredibly important aspect of plant operation to ensure that the liquid maintains its ability to cool the fuel cells within the vessel in a pressurized water reactor. Calculating sub-cooling just required finding the saturation temperature of a liquid and subtracting the current liquid temperature from that value. If it is a positive value, the liquid is sub-cooled. __________________________________________________________________________ References: 3 Key Student, (n.d.) PWR Simulator. https://www.3keystudent.com/ Efunda, (n.d.) Saturated Steam Table. https://www.efunda.com/materials/water/steamtable_sat.cfm

Your preview ends here

Eager to read complete document? Join bartleby learn and gain access to the full version