Scale-4 Analysis of Pressurized Water Reactor Critical Configurations: Volume 4-Three Mile Island Unit 1 Cycle 5

DeHart, Mark D.

doi:10.2172/885647

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…31 Similarly, some early domestic operations included CR insertions of notable depths, usually for some portion of an assembly's first cycle of burnup. 32 Also, axial power shaping rods (APSRs) may be inserted during normal operations at B&W plants, but impact fewer assemblies (e.g., in Three Mile Island Unit-1, eight assemblies/core may contain APSRs, while 24 assemblies/core may contain CRs 33 ). Fuel shuffling between cycles reduces the probability that a fuel assembly will be exposed to CR/APSR insertions during more than one cycle.…”

Section: Control Rodsmentioning

confidence: 99%

Assessment of Reactivity Margins and Loading Curves for PWR Burnup Credit Cask Designs

Wagner¹

2002

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Section: Control Rodsmentioning

confidence: 99%

Assessment of Reactivity Margins and Loading Curves for PWR Burnup Credit Cask Designs

Wagner¹

2002

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“…Korea Hydro and Nuclear Power‐Central Research Institute (KHNP‐CRI) developed a manufacturing method for R‐BA 13 . Furthermore, it can be shown that CRs with axially‐heterogeneous compositions can significantly reduce the axial shape index (ASI) compared with CRs with axially‐homogeneous compositions, based on the principles of partial strength CR 14 . The disadvantages of R‐BA and heterogeneous CRs are the highly complex design and fabrication process of fuel pins and CRs.…”

Section: Introductionmentioning

confidence: 99%

Conceptual design of long‐cycle boron‐free small modular pressurized water reactor with control rod operation

et al. 2020

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Summary This paper presents a new conceptual design of soluble‐boron‐free small modular pressurized water reactor (SMPWR) core with the following singular features: long operation cycle, axially heterogeneous adjuster control rods, and ring‐type burnable absorbers (R‐BAs) coated on the outside of cladding materials. The core loads 37 Westinghouse‐type 17 × 17 fuel assemblies (FAs) of active fuel height 200 cm and produces 180 MW of nominal thermal power during a cycle length of 1555 effective full power days (EFPDs). Three types of burnable absorbers (BAs) are used to address the excess reactivity and obtain a long cycle: 2 w/o and 8 w/o enriched Gd2O3 integral‐type BA (IBA), natural gadolinium R‐BA, and 80 w/o enriched 10B Al2O3/B4C wet annular burnable absorber (WABA). Two types of 200 cm long axially heterogeneous adjuster control rods are used to control the reactivity and the offset in axial power distribution. The first rod type adopts HfB2 with 80 w/o enriched 10B for the bottom 140 cm and stainless steel for the top 60 cm. The second rod type uses HfB2 (natural boron) for the bottom 100 cm and HfB2 (80 w/o enriched 10B) for the top 100 cm. A detailed safety parameter analysis is conducted to verify the imposed design limits, namely, axial shape index of less than ±0.4, 3D power peaking factor of smaller than 5.09, required shutdown margin of greater than 3000 pcm, and negative isothermal temperature coefficient during the entire reactor operation. It is successfully demonstrated that the proposed novel SMPWR design satisfies all the design limits and the target cycle length of 1500 EFPDs.

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Sensitivity and Uncertainty Analysis of Commercial Reactor Criticals for Burnup Credit

2009

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Scale-4 Analysis of Pressurized Water Reactor Critical Configurations: Volume 4-Three Mile Island Unit 1 Cycle 5

Cited by 3 publications

References 7 publications

Assessment of Reactivity Margins and Loading Curves for PWR Burnup Credit Cask Designs

Assessment of Reactivity Margins and Loading Curves for PWR Burnup Credit Cask Designs

Conceptual design of long‐cycle boron‐free small modular pressurized water reactor with control rod operation

Sensitivity and Uncertainty Analysis of Commercial Reactor Criticals for Burnup Credit

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