ML18085A344

Conversation Record with J. Tomlinson, D. Mitra-Majumdar, A. Mohammad, and I. Rampall/Holtec Clarification Call: Thermal RAI (CAC: 001028, Docket No.: 07201040, Edip: L-2017-LLA-0033)

ML18085A344
Person / Time
Site:	HI-STORM 100
Issue date:	03/26/2018
From:	Pamela Longmire, John Mckirgan, Jorge Solis Spent Fuel Licensing Branch
To:	Mitra-Majumdar D, Mohammad A, Rampall I, Tomlinson J Holtec
Longmire P
References
CAC 001028, EPID L-2017-LLA-0033
Download: ML18085A344 (2)

Text

NRC FORM 699 /" -.... U.S. NUCLEAR REGULATORY COMMISSION DATE OF SIGNATURE

\........:i (03-2013) f g CONVERSATION RECORD /.U,/oUJ1?

NAME OF PERSON(S) CONTACTED OR IN CONTACT WITH YOU DATE OF CONTACT TYPE OF CONVERSATION DE-MAIL Joyce Tomlinson (856-797-0900 ext 3765) 0 03/22/2018 TELEPHONE E-MAIL ADDRESS TELEPHONE NUMBER D INCOMING J.Tomlinson@holtec.com (888) 790-1889 0 OUTGOING ORGANIZATION DOCKET NUMBER(S)

Holtec International 72-1040 LICENSE NUMBER(S) CONTROL NUMBER(S)

Holtec Hi-Storm UMAX, Amendment #3 SUBJECT Clarification call: Thermal RAI CAC/Docket No./EPID: 001028/07201040/L-2017-LLA-0033

SUMMARY

The purpose of the conference call was to obtain an update on the progress and clarification on the approach to resolving the thermal RAI issued with the acceptance letter dated 1/17/18 (ADAMS Accession No. ML18018A018) for amendment 3 to the certificate of compliance (CoC) No. 1040, the Hi-Storm UMAX system. Holtec stated they plan to use report PNL-7839,"Performance testing and analyses of the VSC-17 ventilated concrete cask", for the experimental data to support their benchmarking efforts. Basically, Holtec plans to develop a homogenized model of the VSC-17 for comparison to the PNL-7839 data; after obtaining model agreement with the experimental data they plan to then apply the same method in the homogenization of the 24PT1-DSC. Given one system (VSC-17) is an above-ground system and 24PT1-DSC is a below-grade system, NRC's staff suggested for Holtec, when developing their response to the RAI, to consider explaining the differences and uncertainties in the models. NRC's staff again suggested for Holtec to consider development of a detailed canister model. Holtec responded, they believe their approach will be conservative and sufficient to demonstrate the case for safety.

Having a public meeting was mentioned but no apparent or immediate benefit was identified.

Continue on Page 2 ACTION REQUIRED (IF ANY)

NRC action: Maintain good communication with Holtec and continue to assess the need for further interactions including a public meeting.

Holtec action: proceed on current course.

Continue on Page 3 NAME OF PERSON DOCUMENTING CONVERSATION Pamela Longmire, Ph.D.

SIG URE 7.,,u...,.

1

. - - .

• ?-*.,) 0 .

NRC FORM 699 (03-2013)

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NRC FORM 699 /" -.... U.S. NUCLEAR REGULATORY COMMISSION DATE OF SIGNATURE

\........:i (03-2013) f g CONVERSATION RECORD /.U,/oUJ1?

NAME OF PERSON(S) CONTACTED OR IN CONTACT WITH YOU DATE OF CONTACT TYPE OF CONVERSATION DE-MAIL Joyce Tomlinson (856-797-0900 ext 3765) 0 03/22/2018 TELEPHONE E-MAIL ADDRESS TELEPHONE NUMBER D INCOMING J.Tomlinson@holtec.com (888) 790-1889 0 OUTGOING ORGANIZATION DOCKET NUMBER(S)

Holtec International 72-1040 LICENSE NUMBER(S) CONTROL NUMBER(S)

Holtec Hi-Storm UMAX, Amendment #3 SUBJECT Clarification call: Thermal RAI CAC/Docket No./EPID: 001028/07201040/L-2017-LLA-0033

SUMMARY

The purpose of the conference call was to obtain an update on the progress and clarification on the approach to resolving the thermal RAI issued with the acceptance letter dated 1/17/18 (ADAMS Accession No. ML18018A018) for amendment 3 to the certificate of compliance (CoC) No. 1040, the Hi-Storm UMAX system. Holtec stated they plan to use report PNL-7839,"Performance testing and analyses of the VSC-17 ventilated concrete cask", for the experimental data to support their benchmarking efforts. Basically, Holtec plans to develop a homogenized model of the VSC-17 for comparison to the PNL-7839 data; after obtaining model agreement with the experimental data they plan to then apply the same method in the homogenization of the 24PT1-DSC. Given one system (VSC-17) is an above-ground system and 24PT1-DSC is a below-grade system, NRC's staff suggested for Holtec, when developing their response to the RAI, to consider explaining the differences and uncertainties in the models. NRC's staff again suggested for Holtec to consider development of a detailed canister model. Holtec responded, they believe their approach will be conservative and sufficient to demonstrate the case for safety.

Having a public meeting was mentioned but no apparent or immediate benefit was identified.

Continue on Page 2 ACTION REQUIRED (IF ANY)

NRC action: Maintain good communication with Holtec and continue to assess the need for further interactions including a public meeting.

Holtec action: proceed on current course.

Continue on Page 3 NAME OF PERSON DOCUMENTING CONVERSATION Pamela Longmire, Ph.D.

SIG URE 7.,,u...,.

1

. - - .

• ?-*.,) 0 .

NRC FORM 699 (03-2013)

Page 1 of 2