ML032060541

Attachment 2 (Handouts) to 07/24/03 Meeting with Pacific Gas and Electric Company Regarding a Proposed Independent Spent Fuel Storage Installation at Humboldt Bay 72-27 (TAC L23589)

ML032060541
Person / Time
Site:	Humboldt Bay
Issue date:	04/03/2003
From:	PG&E Corp
To:	Office of Nuclear Material Safety and Safeguards
Allen W
Shared Package
ML032060065	List: ML032060158 ML032060541
References
TAC L23589
Download: ML032060541 (19)

Text

NRC - PG&E Meeting April 3 2003 Humboldt Bay ISFSI Project (HBIP)

April 3, 2003 I

Agenda

1. HBIP History

2. Schedule and Planning

3. GTCC Concept

4. Approach for Confinement Analysis

5. HBIP Design Concepts

6. Future Discussions & Meetings April 3, 2003 2

HBIP History

• Overview of Humboldt Bay

• Brief Summary of Previous NRC Meetings April 3, 2003 3

History Overviewv

• Humboldt Bay Unit 3 Shutdown in 1976

• Entered SAFSTOR 1988

• Decision for Dry Storage 1997-1998

• Authorized to use Decom Trust Fund 1999

• Delayed to request additional Funding 2000

• Completed Seismic Design Criteria 2002

• Signed Contract with Holtec 2003 April 3, 2003 4

April 3, 2003 5 Previous NRC Meetings

• April 1999 ISFSI QA Plan (72.140) HBL-99-0 10

• November 1999, Public Access Across lOOm Controlled Area (72.106)

• March 2000, potential need to use probabilistic techniques for Part 50 and 72 activities

• June 6th 2002, Licensing Basis and Design Concept April 3, 2003 6

HBIP Schedule and Planning

• Design Effort

- Final Design of Vault, HiStarHB, MPCHB and Davit scheduled for Mid 2003.

- Completion of Part 50 accident analyses Mid 2003

- Completion of Part 72 accident analysis scheduled to complete 3rd Quarter 2003.

• Licensing Effort

- Part 50 LAR to be submitted 3rd quarter 2003

- Part 72 Application to be submitted end of 2003 April 3, 2003 7

GTCC

• 6th container in vault for GTCC storage

• In accordance with ISG- 17

• Waste characteristics

- Form

- Maximum quantity

- Radionuclide inventory

• Waste form compatibility with container

• Handling systems same as HI-STAR HB spent fuel casks April 3, 2003 8

Confinement Approach

• The Holtec MPC is a redundant, welded stainless steel enclosure vessel, acting as the confinement boundary

• Testing was performed in March, 2002 to demonstrate that the MPC meets ANSI 14.5 for leak-tight

• ISG-5, Rev 2 is expected to be issued shortly, classifying such canisters as leak tight based on this test April 3, 2003 9

HBIP Design Concept

• HBPP Dry Storage Activities (Updated since 6/6/02 meeting)

• ISFSI Vault ISFSI Security

• Cask Handling equipment design (Davit Design is ProprietaryInformation)

April 3, 2003 10

Dry Storage Activities Work in the Refueling Building will be under existing licensing basis and using Seismic Design Criteria of O.5g

- Accidents evaluations to be based on;

• Humboldt Bay Unit 3 Living DSAR

• NRC April 29, 1987 SER for Humboldt unit 3

• All work outside the Refueling Building will be under the new Part 72 Licensing basis with Seismic Design Criteria >1.Og April 3, 2003 I1I

Cask Handling Concepts

• Inside Refueling Building (RFB)

- Handling performed Under existing Part 50 licensing basis

• Move Cask into refueling building on cart

• Using special lifting device lower empty cask into pool

• Load cask and set MPC lid in place

• Install MPC lid restraint system

• Lift loaded cask from pool using special lifting device

• Set loaded cask on cart in work location

• Perform MPC welding and remove lid restraint system

• Perform drying and helium backfill procedures.

• Install permanent HI-STAR cover

• Roll cask out of RFB to be received by the transporter April 3, 2003 12

Cask Handling Concepts (cont)

• Outside Refueling Building

- Transportation Casks to ISFSI under Part 72 Licensing basis

• Crawler receives cask outside RFB and transports to the ISFSI facility At the ISFSI Facility

- Handling performed Under Part 72 licensing basis

• Crawler lowers the casks into their individual vaults

• Seismic restraints installed inside vault

• Vault Cover installed April 3, 2003 13

In-Ground Vault Storage April 3, 2003 14

Vault Design

• Concrete Structural Design per ACI-349-01

• Steel Components and Bolting per ASME NF (Equipment Supports and Bolting)

• No bolting of lids into Concrete

• Vault Motion Specified as 3-D DBE (4 seismic events).

April 3, 2003 15

Vault Design (Con't.)

• Impact Loads come from:

- Cask contact with lid and floor

- Cask contact with Upper and Lower Spacers

• Separate Dynamic Analysis of Cask plus Contents Provides Impact Loads on Steel Liner.

• Interface Contact simulation chosen to provide upper bound on impact loads between cask and liner and vault lid

• Structural analysis includes 1 to 6 locations filled with casks April 3, 2003 16

Detaile Cutaway oftorageLocaIon Detailed Cutaway of Storage Location April 3, 2003 17

Lid Attachment Detail April 3, 2003 18

.SV Future Discussions and Meeting Subj ects

• Potential QA Plan changes

- Evaluating the revision to the Humboldt ISFSI QA Plan referred to in HBL-99-0 1O

• Probabilistic evaluations for short duration activities

• Geo-technical presentation April 3, 2003