ML13247A349

Prairie Island - Revised ISFSI Bases, Includes Revised Record of Revision, Revised Current Page List, and Revision 9 to Page B 3.1.5-1

ML13247A349
Person / Time
Site:	Prairie Island
Issue date:	08/28/2013
From:	Nuclear Management Co
To:	Office of Nuclear Material Safety and Safeguards
References
000225895
Download: ML13247A349 (5)

Text

T-02ToFacilityAddressNRC DOC CONTROL DESK COPY #383PI Department ONE WHITE FLINT NORTH11555 ROCKVILLE PIKEROCKVILLE, MD 20852-2738 PASSPORT DOCUMENTTRANSMITTAL Page:il~ Hg ~ I ~lnmiliI lll lll Nll l aillFrom C-DOC CNTRL-PI Attention:

Address : 1717 WAKONADE DR EASTCityCountryEmailContactDate/Time Trans No.Total Items:WELCHUNITED STATES08/28/2013 0'000225895 00001State: MN Postal Code: 550895:48 Transmittal Group Id:Title:0000025413 Item Facility Type Sub Document Number Sheet Doc Status Revision Doc Date Copy # Media Cpys0001 PI LIC BASE ISFSI BASES ISSUED 009 383 HC 01If a document was not received or is no longer required check the response below and return to sender.Documents noted above not received (identify those not received).

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ISFSI BASESUPDATING INSTRUCTIONS Revision 9ISFSI BASESREMOVEPaqe Revision Document TypeB RoR-1 12/10/12 Record ofRevisionA 12/10/12 Current PageListPage Revision Section/Chapter B 3.1.5-1 7 B 3.1_ _ _ _ I _ __ i __t *1-I +Prairie IslandUnits 1 and 2ISFSI-B-1 8/27/13 PRAIRIE ISLAND NUCLEAR GENERATING PLANTINDEPENDENT SPENT FUEL STORAGE INSTALLATION RECORD OF REVISION BASES CHANGES AND LICENSE AMENDMENTS NSPM Date of LicenseRevision Issue Amendment No. Remarks(REV) No.I thrnn h ý Or;o nnl Rt xunrp nrt nf AT hnoinl57898/20/2010 12/12/2012 7Specifications Initial Issue of revised format andInclusion of TN-40HT design.Clarify "helium environment" requirement in ISFSI SR 3.1.2.1.Revise B 3.1.5 paraphrase ofregulatory requirements.

8/27/13Prairie IslandISFSIB RoR- 88/27/13 BASES CURRENT PAGESPAGE DATEB RoR- 1 8/27/13A 8/27/13i 8/20/10PAGE REVISION No.B 2.0-1 7B 2.0-2 7B 3.0-1 7B 3.0-2 7B 3.0-3 7B 3.0-4 7B 3.0-5 7B 3.0-6 7B 3.0-7 7B 3.0-8 7B 3.0-9 7B 3.0-10 7B 3.0-11 7B 3.1.1-1 7B 3.1.1-2 7B 3.1.1-3 7B 3.1.2-1 7B 3.1.2-2 7B 3.1.2-3 7B 3.1.2-4 8B 3.1.2-5 7PAGE REVISION No.B 3.1.3-1 7B 3.1.3-2 7B 3.1.3-3 7B 3.1.3-4 7B 3.1.4-1 7B 3.1.4-2 7B 3.1.4-3 7B 3.1.5-1 9B 3.1.5-2 7B 3.1.5-3 7B 3.1.5-4 7B 3.1.5-5 7B 3.1.6-1 7B 3.1.6-2 7B 3.1.6-3 7B 3.2.1-1 7B 3.2.1-2 7B 3.2.1-3 7B 3.2.2-1 7B 3.2.2-2 7B 3.2.2-3 7B 3.3.1-1 7B 3.3.1-2 7B 3.3.1-3 7B 3.3.1-4 7B 3.4.1-1 7B 3.4.1-2 7B 3.4.1-3 7Prairie IslandISFSIA8/27/13 Cask Interseal PressureB 3.1.5B 3.1 CASK INTEGRITY B 3.1.5 Cask Interseal PressureBASESBACKGROUND A cask is loaded, dried, and sealed prior to being transported to theISFSI and placed on a storage pad. The cask is designed withredundant seals to contain the radioactive material.

In addition, 10 CFR 72.122(h)(4) requires that confinement systems have thecapability of being monitored.

The monitoring systems provide:a. the capability to monitor interseal pressure that will indicate ifcask seal integrity is compromised; andb. local alarms to indicate that potential seal degradation hasoccurred.

It is necessary to verify cask seal integrity at regular intervals toensure the cask's interseal containment boundary is beingmaintained and to verify there is no seal leakage to the environment.

APPLICABLE SAFETYANALYSISThe confinement of radioactive material during the storage of spentfuel in a cask is ensured by the use of multiple confinement barriersand systems.

The barriers relied upon are the uranium dioxide fuelpellet matrix, the metallic fuel cladding tubes in which the fuelpellets are contained, and the cask in which the fuel assemblies arestored. Long-term integrity of the fuel cladding depends on storagein an inert atmosphere.

This is accomplished by removing waterfrom the cask cavity and backfilling the cavity with an inert gas.The failure of storage cask confinement capability is considered inPrairie IslandISFSIB 3.1.5-1Revision 9 1