Advanced search
Publication Cover
Journal of Nuclear Science and Technology Volume 53, 2016 - Issue 10
Submit an article Journal homepage
692
Views
1
CrossRef citations to date
0
Altmetric
Technical Material

Analysis of fuel temperature effects on reactivity of light water reactor fuel assemblies by using MVP-2 adopting an exact resonance elastic scattering model

Toru YamamotoDivision of Research for Reactor System Safety, Regulatory Standard and Research Department, Secretariat of Nuclear Regulation Authority (S/NRA/R), Tokyo, JapanCorrespondence[email protected]
&
Tomohiro SakaiDivision of Research for Reactor System Safety, Regulatory Standard and Research Department, Secretariat of Nuclear Regulation Authority (S/NRA/R), Tokyo, Japan
Pages 1662-1671 | Received 30 Nov 2015, Accepted 21 Dec 2015, Published online: 08 Feb 2016

Figures & data

Figure 1. Neutron elastic scattering and capture cross sections of 238U in 1–103 eV [Citation13]. The figures attached to the major resonance peaks are neutron energies of the peaks.

Figure 1. Neutron elastic scattering and capture cross sections of 238U in 1–103 eV [Citation13]. The figures attached to the major resonance peaks are neutron energies of the peaks.

Figure 2. Neutron elastic scattering, fission, and capture cross sections of 235U in 1–103 eV [Citation13].

Figure 2. Neutron elastic scattering, fission, and capture cross sections of 235U in 1–103 eV [Citation13].

Figure 3. Neutron elastic scattering, fission, and capture cross sections of 239Pu in 1–103 eV [Citation13].

Figure 3. Neutron elastic scattering, fission, and capture cross sections of 239Pu in 1–103 eV [Citation13].

Table 1. List of analyzed mockup assemblies [Citation12].

Table 2. kinf's of the assemblies calculated by using MVP-2 coupled with the asymptotic and exact models for the base conditions [Citation12].

Table 3. kinf's of the assemblies calculated by using MVP-2 coupled with the asymptotic and exact models for the high-temperature condition [Citation12].

Figure 4. Differences in groupwise reaction rates between the exact and asymptotic model calculations for the PWR 17 × 17 (4.8) UO2 assembly at the fuel temperature of 1500 ℃.

Figure 4. Differences in groupwise reaction rates between the exact and asymptotic model calculations for the PWR 17 × 17 (4.8) UO2 assembly at the fuel temperature of 1500 ℃.

Figure 5. Differences in groupwise reaction rates between the exact and asymptotic model calculations for the PWR 17 × 17 (MOX) assembly at the fuel temperature of 1500 ℃.

Figure 5. Differences in groupwise reaction rates between the exact and asymptotic model calculations for the PWR 17 × 17 (MOX) assembly at the fuel temperature of 1500 ℃.

Figure 6. Differences in groupwise reaction rates of the calculations with the asymptotic model between 1500 and 284 ℃ of the pellet temperatures for the PWR 17 × 17 (4.8) UO2 assembly.

Figure 6. Differences in groupwise reaction rates of the calculations with the asymptotic model between 1500 and 284 ℃ of the pellet temperatures for the PWR 17 × 17 (4.8) UO2 assembly.

Figure 7. Differences in groupwise reaction rates of the calculations with the asymptotic model between 1500 and 284 ℃ of the pellet temperatures for the PWR 17 × 17 (MOX) assembly.

Figure 7. Differences in groupwise reaction rates of the calculations with the asymptotic model between 1500 and 284 ℃ of the pellet temperatures for the PWR 17 × 17 (MOX) assembly.

Figure 8. Differences in kinf's between the asymptotic and exact models for the base- and high-temperature conditions.

Figure 8. Differences in kinf's between the asymptotic and exact models for the base- and high-temperature conditions.

Table 4. Doppler reactivity (base to 1500 ℃) of the assemblies calculated by using MVP-2 coupled with the asymptotic and exact models [Citation12].

Figure 9. Doppler reactivity (base to 1500 ℃) with the asymptotic and exact models [Citation12]. The base temperatures are 520 ℃ for the BWR assemblies and 284 ℃ for the PWR assemblies.

Figure 9. Doppler reactivity (base to 1500 ℃) with the asymptotic and exact models [Citation12]. The base temperatures are 520 ℃ for the BWR assemblies and 284 ℃ for the PWR assemblies.

Figure 10. Relative differences in Doppler reactivity (base to 1500 ℃) between the calculations of the asymptotic and exact models [Citation12].

Figure 10. Relative differences in Doppler reactivity (base to 1500 ℃) between the calculations of the asymptotic and exact models [Citation12].

Figure 11. Comparison of the effects on Doppler reactivity of the exact model between applying it only to 238U and that to all nuclides.

Figure 11. Comparison of the effects on Doppler reactivity of the exact model between applying it only to 238U and that to all nuclides.

Figure 12. Differences in kinf's between the asymptotic and exact models (all nuclides except 238U) for the base- and high-temperature conditions.

Figure 12. Differences in kinf's between the asymptotic and exact models (all nuclides except 238U) for the base- and high-temperature conditions.

Figure 13. Comparison of the effects on Doppler reactivity of the exact model between applying to all nuclides except 238U and that to all nuclides.

Figure 13. Comparison of the effects on Doppler reactivity of the exact model between applying to all nuclides except 238U and that to all nuclides.

Figure 14. Differences in groupwise reaction rates between the exact and asymptotic model calculations for the PWR 17 × 17 (4.8) UO2 assembly at the fuel temperature of 1500 ℃, where the exact model was applied to all nuclides except 238U.

Figure 14. Differences in groupwise reaction rates between the exact and asymptotic model calculations for the PWR 17 × 17 (4.8) UO2 assembly at the fuel temperature of 1500 ℃, where the exact model was applied to all nuclides except 238U.

Figure 15. Differences in groupwise reaction rates between the exact and asymptotic model calculations for the PWR 17 × 17 (MOX) assembly at the fuel temperature of 1500 ℃, where the exact model was applied to all nuclides except 238U.

Figure 15. Differences in groupwise reaction rates between the exact and asymptotic model calculations for the PWR 17 × 17 (MOX) assembly at the fuel temperature of 1500 ℃, where the exact model was applied to all nuclides except 238U.

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Order Reprints Request Corporate Permissions

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

Request Academic Permissions

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.

Related research

People also read lists articles that other readers of this article have read.

Recommended articles lists articles that we recommend and is powered by our AI driven recommendation engine.

Cited by lists all citing articles based on Crossref citations.
Articles with the Crossref icon will open in a new tab.