ML20209G935
| ML20209G935 | |
| Person / Time | |
|---|---|
| Site: | South Texas  |
| Issue date: | 07/15/1999 |
| From: | HOUSTON LIGHTING & POWER CO. |
| To: | |
| Shared Package | |
| ML20209G933 | List: |
| References | |
| NUDOCS 9907200060 | |
| Download: ML20209G935 (5) | |
Text
I l
NOC-AE-000564 Page 1 of 5 l
)
l ATTACHMENT 2 Replacement Proposed Technical Specification Pages l
4 9907200060 990715 PDR ADOCK 05000498 P
-)
1 NOC-AE-000564 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)
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 l
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 1 psi at least once every 18 7
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 analys s assumes automatic operation of the atmospheric steam relief valves i
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
t bl i di tdt t
. pressure a or e ow an n ca e s eam genera or 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 post-refueling low power physics testing), the atmospheric steam relief valves 1
may be operated in manual and open in Mode 2 to maintain the secondary side 3
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
I