ML20126D858

Forwards Application for Amend to License NPF-3,changing TS 3/4.6.4.3, Containment Hydrogen Dilution Sys, & Associated Bases to Add Addl Action Statement to Apply When Both Containment Hydrogen Sys Inoperable

ML20126D858
Person / Time
Site:	Davis Besse
Issue date:	12/21/1992
From:	Shelton D CENTERIOR ENERGY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20126D861	List: ML20126D858 ML20126D889 ML20126D898
References
NUDOCS 9212280191
Download: ML20126D858 (2)

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Donald C Shelton 300 Ma& son Avenue Vce President Nuclear Toledo, OH 436520001 Davis Besse (419)249 2300 Docket Number 50-346 License Number NPF-3 Serial Number 2071 December 21, 1992 United States Nuclear Regulatory Commission Document Control Desk Vashington, D. C. 20555 Subjects-License Amendment Application to Revise Technical Specification 3/4.6.4.3, Containment Hydrogen Dilution System, and Associated Bases Gentlemen Enclosed is an application for an amendment to the Davis-Besse Nuclear Power Station (DBNPS), Unit Number 1 Operating License Number NPF-3, Appendix A, Technical Specifications to reflect the changes attached.

The proposed changes involve Technical Specification (TS) 3/4.6.4.3, Containment Hydrogen Dilution (CHD) System, and associated TS Bases 3/4.6.4, Combustible Gas Control.

This application proposes adding an additional Action statement which would apply when both containment hydrogen dilution systems are inoperable and allow 72 hours8.333333e-4 days <br />0.02 hours <br />1.190476e-4 weeks <br />2.7396e-5 months <br /> to return one of the two inoperable containment hydrogen dilution systems to operable status or be in at least Hot Standby within the next six hours.

Prer.ently, if both containment hydrogan dilution systems.were to become inoperable, TS 3.0.3 vould be entered which requires action to be initiated within one hour to place the plant in a Mode in which the specification does not

apply, i.e., Mode 3 (Hot Standby)..

This proposed Technical Specification change is acceptable because the DBNPS design includes the capability to install an external hydrogen recombination system, which provides another alternate means of combustible gas control. Related changes are proposed to Bases 3/4.6.4, clarifying the discussion of the containment hydrogen purge-system and adding-a discussion of the hydrogen recombination system.

This proposed change is plant-specific and does not constitute a generic change to the existing Revision 4 to the Babcock and Wilcox Standard Technical Specifications (NUREG-0103) because a containment hydrogen dilution system Technical Specification is not included in NUREG-0103.

A containment hydrogen dilution system Technical-Specification is also not included in the Babcock and-Vilcox Revised 4

c8000,U Standard Technical Specifications (NUREG-1430).

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Docket Number 50-346 i

License Number NPF-3 Serial Number 2071 Page 2 Toledo Edison requests that this amendment be issued by the NRC by June 30, 1993, thereby revising a Limiting Condition for Operation which could cause an unvarranted shutdown of the plant.

Should further information be required, please contact Mr. R. V. Schrauder, Manager - Nuclear Licensing, at (419) 249-2366.-

Very truly yours, l

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HKL/dle Enclosure cci A. B. Davis, Regional Administrator, NRC Region III J. B. Hopkins, NRC/NRR DB-1 Senior Project Manager S. Stasek, DB-1 NRC Senior Resident Inspector J. R. Villiams, Chief of Staff, Ohio Emergency Management Agency, State of Ohio (NRC Liaison)

Utility Radiological Safety Board i