ML20113G885

Forwards Application for Amend to License NPF-3,revising TS 3.1.1.2, Reactivity Control Sys-Boron Dilution & Associated TS Bases 3/4.1.1.2

ML20113G885
Person / Time
Site:	Davis Besse
Issue date:	05/01/1992
From:	Shelton D CENTERIOR ENERGY
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20113G887	List: ML20113G885 ML20113G888 ML20113G890
References
2007, TAC-M83391, NUDOCS 9205130183
Download: ML20113G885 (2)

Text

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4 CENTERDOR ENERGY Donald C. Shelton 333 m on W Yoe hesdent.Nxnes bW W 43M2@1 Da M rsse (419)249 2300 Docket Number 50-346 License Number NPF-3 Serial Number 2007 May 1, 1992 i Unittd States '..uclear Regulatory Commission Document Control Desk Vashington, DC 20555 Subj ect : License bendment Application to Revise Technical Specifications Regarding Boron Dilution Requirements Centlement Enclosed is an application for an amendment to the Davis-Besse Nuclear Power Station (D8NPS), Unit Number 1 Operating License Number NPF-3, Appendix A, Technical Specifications to reflect the changes attached.

The proposed changes involve Technical Specification (TS) 3.1.1.2, Reactivity Control Systems-Boron Dilution, and associated TS Bases -

3/4.1.1.2.

Technical Specification 3.1.1.2 requires that the flow rate of reactor coolant through the Reactor Coolant System (RCS) be greater than or equal to 2800 gpm whenever a reduction in RCS boron concentration is being made. A minimum flov rate of at least 2800 gpm provides adequate mixing, prevents stratification and ensures that reactivity changes vill be gradual in the RCS. This TS is applicable in all plant Modes.

Vith the flov rate of reactor coolant through the RCS less than 2800 gpm, the TS Action statement requires the immediate suspension of all operations involving a reduction in RCS boron concentration.

The proposed chnage to TS 3.1.1.2 vould add a footnote that pt ;vides an exception applicable in Mode 6 (refueling). Specifically, with the flow rate of reactor coolant through the RCS less than 2800 gpm, the footnote vould allov the addition of vatet of lover baron concentration than the RCS, provided that the boron concentration of the vater to be added is greater than the boron concentration corresponding to the more restrictive reactivity condition specified in TS 3.9.1, Refueling Operations-Boron Concentration. This exception is acceptable since as long as the boron concentration of the water to be added to the RCS is 110080 \ 920sicotea ,203o3 opeong compones Cleve+ond Dectoc illuminonng hDR ADOCK 05000346 PDg */)h/

v Toledo Ed son 0

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. Docket Number 50-346 License Nutnber NPF-3 Serial Number 2007 t- , 'Page 2 l

greater than the refueling boron concentration, the RCS borca i concentration is assured to remain greater than the required refuelinF L concentration. Therefore, in this situation, even if incomplete mixing did occut, it vould be of no adverse safety consequence. A related change is proposed clarifying Bases 3/4.1.1.2.

i Toledo Edison requests that this amendment be issued by the NRC by October 30, 1992, to support the planning and scheduling of the Eighth Pefueling Outage (8RFO). The 8RF0 is currently scheduled to commenre on Ma*ch 1, 1993. Should further information be required, olease

! con, A ? "; R. V. Fehtauder, Manecer - Nuclear Licensing, at l ( 419,' LO-2366.

t Very truly yours,

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I L Enclosure t

l l cc: A. B. Davis, Regional Administrator, NPC Region III l J. B. Hopkins, NRC/NRR DB-1 Senior Project Man,cc:

W. Levis, NRC Region III, DB-1 Senior Resident Inspector J. R. Villiams, Chief of Staff, Ohio Emergency Management Agency, L State of Ohio (NRC Liaison) i Uti1**y Radiological Safety Board l l l

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