ML20148A659

Proposed Tech Specs,Revising Existing Exception to LCO 3.0.4 as Applies to LCO 3.6.1.9 for MSIV Leakage Control Sys

ML20148A659
Person / Time
Site:	Perry
Issue date:	05/02/1997
From:	CENTERIOR ENERGY
To:
Shared Package
ML20148A657	List: ML20148A659 PY-CEI-NRR-2164, Application for Amend to License NPF-58,revising Existing Exception to LCO 3.0.4 as Applies to LCO 3.6.1.9 for MSIV Leakage Control Sys
References
NUDOCS 9705090109
Download: ML20148A659 (2)

Text

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Attachmenr3

, PY-CEI/NRR-2164L Page1ofI MSIV LCS 3.6.1.9 3.6 CONTAINMENT SYSTEMS 3.6.1.9 Main Steam Isolation Valve (MSIV) Leakage Control System (LCS)

LC0 3.6.1.9 Two MSIV LCS subsystems shall be OPE'RABLE.

1 APPLICABILITY: MODES 1. 2. and 3.

.1

! ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME l

g-vywv l A. One MSIV LCS subsystem A.1 L

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NOTE--------- 1 inoperable.

' 1 e for the inboard

,yl;ti;,, .! MSIV LCS subsystem.

O gr;tir.; C.rcle C.

4 w .

Restore MSIV LCS 30 days subsystem to OPERABLE status.

B. Two MSIV LCS B.1 Restore one MSIV LCS 7 days  !

subsystems inoperable, subsystem to OPERABLE l

. status.

C. Required Action and C.1 Be in MODE 3. 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> associated Completion Time not met. AN_Q C.2 Be in MODE 4. 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> l

4

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9705090109 970502 PDR ADOCK 05000440 P PDR PERRY - UNIT 1 3.6-27 Amendment 69 k

.. Attachment 4 '

' PY-CEl/NRR-2164L

. Na chrnges are pr: posed PageI d I to this page. This Bases page is provided for MSIV LCS  ;

information only. B 3.6.1.9 1 BASES APPLICABLE The MSIV LCS satisfies Criterion 3 of the NRC Policy SAFETY ANALYSES Statement.

(continued)

LC0 One MSIV LCS subsystem can provide the required processing -

of the MSIV leakage. To ensure that this capability is available, assuming worst case single failure, two MSIV LCS i subsystems must be OPERABLE.

l APPLICABILITY In MODES 1. 2. and 3, a DBA could lead to a fission product  !

release to primary containment. Therefore, MSIV LCS l OPERABILITY is required during these MODES.

and 5. the probability and consequences of the,In MODES se events are 4 reduced due to the pressure and temperature limitations in these MODES. Therefore, maintaining the MSIV LCS OPERABLE is not required in MODE 4 or 5 to ensure MSIV leakage is processed.

ACTIONS Al With one MSIV LCS subsystem inoperable, the inoperable MSIV LCS subsystem must be restored to OPERABLE status within 30 days. In this Condition, the remaining OPERABLE MSIV LCS subsystem is adequate to perform the required leakage control function. However, the overall reliability is reduced because a single failure in the remaining subsystem could result in a total loss of MSIV leakage control function. The 30 day Completion Time is based on the redundant capability afforded by the remaining OPERABLE MSIV LCS subsystem and the low probability of a DBA LOCA occurring during this period. An LCO 3.0.4 exception is 3rovided to permit changes in MODES when the inboard MSIV I

_CS subsystem becomes inoperable due to condensate buildu between the MSIVs when the plant is operated below 50% RA ED THERMAL POWER.

fL1 With two MSIV LCS subsystems inoperable, at least one subsystem must be restored to OPERABLE status within 7 days.

The 7 day Completion Time is based on the low probability of the occurrence of a DBA LOCA.

(continued)

PERRY - UNIT 1 B 3.6-52 Revision No. 1