ML20203L453

Forwards Licensee Calculation Mc 6305, RHR Relief Valves as Coms/Ltop, & Rev 1 to Rept.Subj Calculation Should Be Placed in PDR

ML20203L453
Person / Time
Site:	South Texas
Issue date:	02/27/1998
From:	Alexion T NRC (Affiliation Not Assigned)
To:	NRC (Affiliation Not Assigned)
Shared Package
ML20197B153	List: ML20197B146 ML20203L453
References
TAC-MA0614, TAC-MA0615, TAC-MA614, TAC-MA615, NUDOCS 9803060063
Download: ML20203L453 (2)

Text

. _ _ _ _ _ _ _ _ _ _ - _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ --

b February 27. 1998 NOTE TO: PD IV-1 File FROM: Tom Alexion 1gProject Directorate IV 1 Division of Reactor Projects lil/IV Office of Nuclear Reactor Regulation

SUBJECT:

LICENSEE'S CALCUl.ATION NO. MC 6305, "RHR RELIEF VALVES AS COMS/LTOP," SOUTH TEXAS PROJECT, UNITS 1 AND 2 (STP) (TAC NOS. MA0614 AND MA0615)

By letter clated November 5,1997, as supplemented by letter dated November 20,1997, the licensee Informed the NRC that two changes were made to Technical Specification Bases Section 3/4.4.9,

• Reactor Coolant System (Low Temperature Overpressure Protection Subsection)." The NRC staff elected to review these Bases changes.

One of the Bases changes stetes that " Analysis conservatively demonstrates that the RHR

[ Residual Heat Removal] relief valves limit RCS [ Reactor Coolant System] pressure to approximately 590 psig." The staff asked the licensee for the supporting calculation for the 590 psig, and the licensee provided the staff with the subject calculation. The purpose of this note is to place the subject calculation in the public document room.

Docket Mos. 50-498 and 5-499 l

Attachment:

As stated I

DISTRIBUTION:

Docket File PUBLIC (PDR)

TAlexion

-3}

I s i m m. n r-- . - . ~ , _ _ , , . . . . ,

9803060063 980227 m.v a' . ~ " ' ' ~ ~ " U PDR ADOCK 05000498 P PDR 1.11.1L1.111111111IllII s s - o -

_]

C [pusog

" ,4 UNITED STATES

.j

't NUCLEAR REGULATORY COMMISSION WAsHINoToN, D.C. 20666-0001 o

% *****/ February 27, 1998 4

NOTE TO: PD IV 1 File FROM: om Alexion

- Project Directorate IV-1 Division of Reactor Projects lil/IV Office of Nuclear Reactor Regulation

SUBJECT:

LICENSEE'S CALCULATION NO. MC 6305,"RHR RELIEF VALVES AS COMS/LTOP," SOUTH TEXAS PROJECT, UNITS 1 AND 2 (STP) (TAC NOS. MA0614 AND MA0615)

By letter dated November 5,1997, as supplemented by letter dated November 20,1997, the licensee informed the NRC that two changes were made to Technical Specification Bases

Section 3/4.4.9, " Reactor Coolant System (Low Temperature Overpressure Protection Subsection)," The NRC staff elected to review these Bases changes.

One of the Bases changes states that " Analysis conservatively demor ites that the RHR

[ Residual Heat Removal) relief valves limit RCS [ Reactor Coolant Syr j pressure to approximately 590 psig." The staff asked the licensee for the supporu ig calculation for the 590 psig, and the licensee provided the staff with the subject calculation. The purpse of this note is to place the subject calculation in the public docunient room.

Docket Nos. 50-498 and 5-499

Attachment:

As stated

.