ML20199L043

Proposed Tech Specs Removing TS 3/4.6.4.3, Containment Systems,Hydrogen Purge Sys

ML20199L043
Person / Time
Site:	Millstone
Issue date:	01/18/1999
From:	NORTHEAST NUCLEAR ENERGY CO.
To:
Shared Package
ML20199L030	List: B17590, Application for Amend to License DPR-65,removing TS 3/4.6.4.3, Containment Systems,Hydrogen Purge Sys, from Plant TS ML20199L043
References
NUDOCS 9901270112
Download: ML20199L043 (8)

Text

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l Docket No. 50-336 B17590 i

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Millstone Nuclear Power Station, Unit No. 2 Proposed Revision to Technical Specifications Deletion of The Technical Specification Related to The Hydrogen Purge System Marked Up Pages January 1999

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9901270112 990118 PDR ADOCK 05000336 P

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i INDEX LINITING CONDITION FOR OPERATION Als SURVEILLANCE REQUIRENENTS SECTION IME 3/4.6 CONTAINNENT SYSTEMS 3/4.6.1 PRIMARY CONTAINNENT.................

3/4 6-1 Containment Integrity................

3/4 6-1 Containment Leakage.................

3/4 6-2 Containment Air Locks 3/4 6-6 Internal Pressure 3/4 6-8 Air Temperature...................

3/4 6-9 Containment Structural Integrity.........

3/4 6-10 3/4.6.2 DEPRESSURIZATION AND COOLING SYSTEMS 3/4 6-12 Containment Spray and Cooling Systems 3/4 6-12 lI3 i

DELETED h

3/4.6.3 CONTAINMENT ISOLATION VALVES

............ 3/4 6-15 k.

Containment Ventilation System 3/4 6-19 3/4.6.4 COMBUSTIBLE GAS CONTROL

.............. 3/4 6-20 liydrogen Monitors

................. 3/4 6-20 Electric Hydrogen Recombiners - M.......... 3/4 6-21 Hydroger. Pr;c Sy;te 3/4 C-23 Post-Incident Recirculation Systems 3/4 6-24 3/4.6.5 SECONDARY CONTAINMENT................

3/4 6-25 Enclosure Building Filtration System 3/4 6-25 Enclosure Building 3/4 6-28

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I NILLSTONE - UNIT 2 Vil AmendmentNo.Jpf,JJJ,7pp,/J'y

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M a"st 1, 1975 /

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NCONTAINMENT SYSTEMS OGEN PURGE SYSTEM LIMITING NDITION FOR OPERATION 3.6.4.3 A conta unent hydrogen purge system shall be DP LE and c:phble of being red from a minimum of one OPERABLE rgency bus.

APPLICABILITY: MODES nd 2.

ACTION-i i

With the containment hydrogen p e sys noperable, restore the hydrogen purge system to OPERABLE tatu ithin'30 days or be in HOT 4

STANDBY within the next 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

1 SURVEILLANCEREQUIREMENT5}

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4.6.4.3 The hydro n purge system shall be demons'.ra OPERABLE l

at least once p 18 months by cycling each valve in the stem flow paths th gh at least one complete cycle.

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l MILLSTONE - UNIT 2 3/4 6-23 t

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. CONTAINMENT SYSTEMS BASES 3/4.6.4 COMBUSTIBLE GAS CONTROL The OPERABILITY of the equipment and systems required for the detection and control of hydrogen gas ensures that this equipment will be available g

to maintain the hydrogen concentration within containment below its flammable #?-

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T limit during post-LOCA conditions.

Either recombincr unit or the purge ss _= -;y;tcm is capable of controlling the expected hydrogen generation associated with 1) zirconium-water reactions, 2) radiolytic de o, position of water, m

and 3) corrosion of metals within containment.

' hydrogen control system /

04 4++ consistent with the recommendations of Regulatory Guide 1.7, " Control of Combustible Cas Concentrations in Containment Following a LOCA."

The post-incident recirculation systems are provided to ensure adequate mixing of the containment atmosphere following a LOCA.

This mixing action will prevent localized accumulations of hydrogen from exceeding the flammable limit.

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,11LL5 TONE - UNIT 2 B 3/4 6-4

Docket No. 50-336 B17590

. Attachment 4 Millstone Nuclear Power Station, Unit No. 2 Proposed Revision to Technical Specifications Deletion of The Technical Specification Related to The Hydrogen Purge System l

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4 January 1999 4

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INDEX LIMITING CONDITION FOR OPERATION AND SURVEILLANCE REQUIREMENTS SECTION gi[

3/4.6 CONTAINMENT SYSTEMS 3/4.6.1 PRIMARY CONTAINMENT.................

3/4 6-1 Containment Integrity................

3/4 6-1 Containment Leakage.................

3/4 6-2 Containment Air Locks 3/4 6-6

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Internal Pressure 3/4 6-8 Air Temperature...................

3/4 6-9 Containment Structural Integrity 3/4 6-10 3/4.6.2 DEPRESSURIZATION AND COOLING SYSTEMS 3/4 6-12 Containment Spray and Cooling Systems 3/4 6-12 DELETED 3/4.6.3 CONTAINMENT ISOLATION VALVES 3/4 6-15 Containment Ventilation. System 3/4 6-19 3/4.6.4 COMBUSTIBLE GAS CONTROL 3/4 6-20 i

Hydrogen Monitors 3/4 6-20 Electric Hydrogen Recombiners - M.......... 3/4 6-21 DELETED l

Post-Incident Recirculation Systems 3/4 6-24 3/4.6.5 SECONDARY CONTAINMENT...'............. 3/4 6-25 Enclosure Building Filtration System 3/4 6-25 Enclosure Building 3/4 6-28 l

t MILLSTONE - UNIT 2 VII Amendment No. Jpp, JJJ, Epp. 7/J.

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r This Page Intentionally Left Blank.

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t MILLSTONE - UNIT 2 3/4 6-23 Amendment No.

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P CONTAINMENT SYSTEMS BASES 3/4.6.4 COMBUSTIBLE GAS CONTROL The OPERABILITY of the equipment and systems required for the detection and control of hydrogen gas ensures that this equipment will be available to maintain the hydrogen concentration within containment below its flammabia limit during post-LOCA conditions.

Either recombiner unit is capable oi controlling the expected hydrogen generation associated with 1) zirconium-water reactions, 2) radiolytic decomposition of water, and 3) corrosion of metals within containment.

This hydrogen control system is consistent with l the recommendations of Regulatory Guide 1.7,

" Control of Combustible Gas Concentrations in Containment Following a LOCA."

The post-incident recirculation systems are provided to ensure adequate mixing of the containment atmosphere following a LOCA.

This mixing action will prevent localized accumulations of hydrogen from exceeding the flammable limit.

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i MILLSTONE - UNIT 2 B 3/4 6-4 Amendment No.

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