NucE 431W Core Design Presentation. Bayshore Unit 1 Reload Core Design Group 13 Michael Bertino Michael Stachnik Submitted to: Dr. K Ivanov Dr. M. Avramova Mentor: Chris Wagener. Table of Contents. Introduction Loading Pattern Development Safety Analysis Operational Data
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Bayshore Unit 1 Reload Core Design
Dr. K Ivanov
Dr. M. Avramova
Mentor: Chris Wagener
CE 2-PWR Loop Core
There are four criteria that must be evaluated to development an initial loading pattern (LP)
Westinghouse RSAC Process:
Input file for rodded FH:
The output E-SRW for HFP BOC
The output E-SRW for HFP EOC
The rod ejection for HZP is the same thing except RELPOW=0 /
The output E-SRW for HZP BOC
The output E-SRW for HZP EOC
4. Power Defect- amount of total reactivity associated with a change in power. It is larger at EOC because the MTC is more negative due to less boron. So reactivity increases.
5. Rod insertion allowance- cannot assume a full worth of control rod banks. The core may have only partially inserted rods at trip. The reactivity depends on how much rod worth there is.
6. Variable Moderator Temperature- The moderator temperature is greater at HFP so when it trips to HZP causes the temperature to decrease causing a spike in reactivity.
Use six cases for ANC input:
To calculate the shutdown margin we took the worst stuck rod case at BOC and EOC
This meets the limit for the shutdown margin by 1.866%.
Calculations that must be performed to make sure the core is running at normal conditions
Measured at BOC, HZP
The rodworth is found using the boron dilution method:
case is bank5
Xenon reactivity after startup and trip is what is calculated using ANC
Speed up calculations core is collapsed from 3-D to 2-D
Deplete the Xenon for over 100 hours
Use the Eigenvalues to calculate the reactivity
ITC must be calculated by doing it the old fashion way, by hand. MTC and DTC are found by ANC and ITC is found using the equation below:
Water In at 278 C
Water In at 285 C
Water Out at 344.79 C
Water Out at 327.13 C
1.Dr. K. Ivanov, Dr. M. Avramova. Nuclear Engineering 431W: Nuclear Reactor Core Design. Department of Mechanical and Nuclear Engineering, The Pennsylvania State University: Spring 2014.
2. C. Wagener. Core Design Training Course. Westinghouse Electric Company, presented to Penn State University: Spring 2014