ML20209G935

Proposed Tech Specs 3.7.1.6 Re Atmospheric Steam Relief Valves

ML20209G935
Person / Time
Site:	South Texas
Issue date:	07/15/1999
From:	HOUSTON LIGHTING & POWER CO.
To:
Shared Package
ML20209G933	List: ML20209G935 NOC-AE-000564, Suppl to 990322 Amends to Licenses NPF-76 & NPF-80,revising TS 3.7.1.6, Atmospheric Steam Relief Valves. Replacement Proposed TS Encl
References
NUDOCS 9907200060
Download: ML20209G935 (5)

Text

I l .

., NOC-AE-000564 Attachment 2 Page 1 of 5 l

)

l ATTACHMENT 2 Replacement Proposed Technical Specification Pages l

1 4

9907200060 990715 PDR ADOCK 05000498 P PDR I

-)

1

. NOC-AE-000564 Attachment 2 Page 2 of 5 Replacement Proposed Technical Specification Pages J

Reference:

Letter from T. H. Cloninger to NRC Document Control Desk, " Proposed 4 New Amendment for Atmospheric Steam Relief Valve Instrumentation and Revised Amendment of Technical Specification 3.7.1.6, Atmospheric Steam Relief Valves", dated March 22,1999 (NOC-AE-000462) l Replace the following pages from the referenced letter with the attached pages.

3/4 3-85 Proposed Insert to Technical Specification Bases Page B 3/4 3-6 Proposed Insert to Technical Specification Bases Page B 3/4 7-3 The changes consist of:

3/4 3-85 Changed CHANNEL CALIBRATION surveillance requirement to 4.3.5.2 with an acceptance criteria of"a nominal" setpoint of 1225 psig " 7 psi".

Added new surveillance requirements 4.3.5.1 for a CHANNEL CHECK and 4.3.5.3 for an ANALOG )

CHANNEL OPERATIONAL TEST.

]

Proposed Insert Pages Changed description from "an indicated" setpoint of 1225 psig to "a nominal" setpoint.

l I

l I

l

4 g INSTRUMENTATION 3/4.3.5 ATMOSPHERIC STEAM RELIEF VALVE INSTRUMENTATION LIMITING CONDITION FOR OPERATION:

3.3.5.1 The atmospheric steam relief valve instrumentation shown in Table 3.3-14 shall be OPERABLE.

APPLICABILITY: As shown in Table 3.3-14 ACTION: As shown in Table 3.3-14 SURVEILLANCE REQUIREMENT 3:

4.3.5.1 Perform a CHANNEL CHECK on each atmospheric steam relief valve automatic actuation channel at least once per 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

4.3.5.2 Perform a CHANNEL CAllBRATION on each atmospheric steam relief valve automatic actuation channel at a nominal setpoint of 1225 psig 17 psi at least once every 18 months.

4.3.5.3 Perform an ANALOG CHANNEL OPERATIONAL TEST on each atmospheric steam relief valve automatic actuation channel at a nominal setpoint of 1225 psig 17psi at least once every 18 months.

SOUTH TEXAS- UNITS 1 &2 3/4 3-85

h Proposed insert to Technical Specification Bases Page B 3/4 3-6 l

Insert 3 l"

3/4.3.5 ATMOSPHERIC STEAM RELIEF VALVE INSTRUMENTATION The atmospheric steam relief valve manual controls must be OPERABLE in i Modes 1,2,3, and 4 (Mode 4 when steam generators are being used for decay heat removal) to allow operator action needed for decay heat removal and safe cooldown in accordance with Branch Technical Position RSB 5-1.

. The atmospheric steam relief valve automatic controls must be OPERABLE

. with a nominal setpoint of 1225 psig in Modes 1 and 2 because the safety i analys s assumes automatic operation of the atmospheric steam relief valves l_ with a nominal setpoint of 1225 psig with uncertainties for mitigation of the small break LOCA. In order to support startup and shutdown activities (including

, post-refueling low power physics testing), the atmospheric steam relief valves l may be operated in manual and open in Mode 2 to maintain the secondary side l . pressure a t orbl e ow an i n ca die tdt s eam genera or t pressure of 1225 psig.

The uncertainties in the safety analysis assume a channel calibration on each atmospheric steam relief valve automatic actuation channel, including verification of automatic actuation at the nominal 1225 psig setpoint, every 18 months.

i 1

I

c

-' d Proposed Insert to Technical Specification Bases Page B 3/4 7-3, Section 3/4.7.1.6, Atmospheric Steam Relief Valves Insert 4 The atmospheric steam relief valve manual controls must be OPERABLE in Modes 1,2,3, and 4 (Mode 4 when steam generators are being used for decay heat removal) to allow operator ection needed for decay heat removal and safe cooldown in accordance with Branch Technical Position RSB 5-1.

. The atmospheric steam relief valve automatic controls must be OPERABLE with a nominal setpoint of 1225 psig in Modes 1 and 2 because the safety analysis assumes automatic operation of the atmospheric steam relief -

valves with a nominal setpoint of 1225 psig with uncertainties for mitigation of the small break LOCA. In order to support startup and shutdown activities (including 1

post-refueling low power physics testing), the atmospheric steam relief valves 3

may be operated in manual and open in Mode 2 to maintain the secondary side pressure at or below an indicated steam generator pressure of 1225 psig.

The verification that all atmospheric steam relief valves will open and close fully prior to startup following a COLD SHUTDOWN of 30 days or longer, or '

following any refueling shutdown, allows for operation using either manual or automatic controls.

i l

l I