ML20280A777
| ML20280A777 | |
| Person / Time | |
|---|---|
| Site: | 07201032, Holtec |
| Issue date: | 10/06/2020 |
| From: | Holtec |
| To: | Office of Nuclear Material Safety and Safeguards |
| Shared Package | |
| ML20280A773 | List: |
| References | |
| 5014910 | |
| Download: ML20280A777 (1) | |
Text
HoltecLetter5014910,Attachment2 ListofPreviousHoltecApplicationswhichJustifyUseofQ/I
- 1. HoltecsubmittedanewMPC68MheatloadpatterninHISTORM100Amendment12 (Submittal-ML16169A363,ApprovedML18279A002).Totalheatloadwashigher(=42.8kW, Table4.III.3aoftheLAR)thantheapprovedpattern(=36.9kW,Table4.III.3aoftheLAR).All calculationswerereperformedwiththenewproposedpattern.
- 2. HoltecsubmittedanewMPC68MheatloadpatterninHISTORM100Amendment14 (SubmittalML18331A056,ApprovalML19295C567).Totalheatloadwaslower(=38.92kW, Table4.III.3aoftheLAR)butperassemblydecayheatswerehigherthantheapprovedpattern
(=42.8kW,Table4.III.3aoftheLAR)i.e.Q/Iisboundedbythatpreviouslyapprovedvalue.Long termstoragecalculationwasperformedwiththenewheatloadpatternandPCTresultswere compared.SincethePCTwasalsolower(=703F,Table4.III.3aoftheLAR)thanthepreviously approvedvalue(=708F,Table4.III.3aoftheLAR)noadditionalcalculationswereperformedwith thenewpattern.Thesameapproachisalsoproposedinthetopicalreport.
- 3. HoltecsubmittednewheatloadpatternsforMPC37inHISTORMFWAmendment5(Submittal ML18179A100,Approval-ML20163A701).Totalheatloadwaslower(=37.4kWforMPC37, Table1.2.3doftheLAR)butperassemblydecayheatswerehigherthantheapprovedpattern
(=44.09kWforMPC37,Table1.2.3aoftheLAR)i.e.Q/Iisboundedbythatpreviouslyapproved value.LongtermstoragecalculationwasperformedwiththenewheatloadpatternandPCT resultswerecompared.SincethePCTwasalsolower(=700F,Table4.4.2oftheLAR)thanthe previouslyapprovedvalue(=703F,Table4.4.3oftheLAR),noadditionalcalculationswere performedwiththenewpatterns.Thesameapproachisalsoproposedinthetopicalreport.