ML19329E313

Hydrazine Spray Sys Requirements.

ML19329E313
Person / Time
Site:	Midland
Issue date:	02/16/1978
From:	CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:
Shared Package
ML19329E309	List: ML19329E308 ML19329E313
References
PROC-780216, NUDOCS 8006120621
Download: ML19329E313 (7)

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ATTACIIMENT A

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i PREL]M8 MARY HYDRAZINE SPRAY SYSThi REQUIRDIENTS l

CONSUMERS POWER COMPANY MIDLAND PLANT UNITS 1 AND 2 1

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PR10MDERY TABLE OF CONTENTS / EFFECTIVE PAGE LIST _

SECTION TITLE PAGE 1.0 SYSTDI CRITERIA 1 2.0 1 REQUIRD!ENTS FOR TIIE REACTOR BUILDING l SPRAY SYSTDi 3.0 APPLICABLE NRC REGULATORY GUIDES 3 1

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REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

DISTRIBUTION FOR INCOMING MATERIAL 50 330 REC: BOYD R S ORG: HOWELL S H DOCDATE: 02/16/78 NRC CONSUMERS PWR DATE RCVD: 02/17/78 DOCTYPE: LETTER NOTARIZED: NO COPIES RECEIVED

SUBJECT:

LTR 1 ENCL 1 ADVISING THAT APPLICANT IS CONSIDERING A DESIGN CHANGE IN THE IODINE REDUCTION PORTIONS IN THE REACTOR BUILDING SPRAY SYSTEM.

PLANT NAME: MIDLAND - UNIT 1 REVIEWER INITIAL: XRL MIDLAND - UNIT 2 DISTRIBUTER INITIAL:

o*oo************* DISTRIBUTION OF THIS MATERIAL IS AS FOLLOWS ******************

PSAR/FSAR AMDT9 AND RELATED CORESPONDENCE (DISTRIBUTION CODE BOO 1)

FOR ACTION: ASST DIR VASSALLO**LTR ONLY BRANCH CHIEF VAROA**LTR ONLY PROJ MGR HOOD **W/ ENCL LIC ASST SERVICE **LTR ONLY INTERNAL: ( hEG LE* W NRC PDR**W/ ENCL i _ W W M ENCL OELD**LTR ONLY.

P. COLLINS **W/ ENCL HOUSTON **W/ ENCL HELTEMES**W/ ENCL CASE **LTR ONLY MIPC**LTR ONLY KNIGHT **LTR ONLY BOSNAK**W/ ENCL SIHWEIL**W/ ENCL PAWLICKI**W/2 ENCL ROSS*r TR ONLY NOVAK**W/ ENCL ROSZTOCZY**W/ ENCL CHECK **W/ ENCL TEDESCO**LTR ONLY BENAROYA**W/ ENCL LAINAS**W/ ENCL IPPOLITO**W/ ENCL F. ROSA **W/ ENCL GAMMILL**W/2 ENCL VOLLMER**LTR ONLY DUNCH**W/ ENCL J. COLLINS **W/ ENCL KREGER**W/ ENCL KIRKWOOD**W/ ENCL EXTERNAL: LPDR'S MIDLAND, MI**W/ ENCL TIC **W/ ENCL NSIC**W/ ENCL ACRS CAT A**W/16 ENCL DISTRIBUTION: LTR 54 ENCL 44 CONTROL NBR: -7999 BON 5 SIZE: 1P+7P #A o**o******************************* THE END ******************************s **$

el D 1.0 SYSTEM CRITERIA Section 6.2.2.1 of the FSAR defines the design criteria for the reactor building spray system. The following is a summary of the requirements which result from the adaptation of a hydrazine spray aystra in place of the sodium hydroxide, sodium thiosulfate cy:Lem as described in the current revision of the FSAR.

2.0 REQUIREMENTS FOR THE REACTOR BUILDING SPRAY SYSTEM 2.1 Design Bases 2.1.1 The design bases as submitted in Subsection 6.2.2.1.1 of the FSAR apply for the proposed hydrazine spray system.

2.1.2 An additional safety design basis is required to ensure that adequate net positive suction head (npsh) exists at the suction of the positive displacement hydrazine pumps during all reactor building spray system operating modes.

2.2 Sizing Requirements 2.2.1 The reactor building spray system shall be designed under the sizing criteria set forth in FSAR Section 6.2.2.1.

2.2.2 The hydrazine addition pumps shall each be capable of supplying a useful flow of 0.3 gpm to the suction of the reactor building spray pumps which have a design flowrate of 1,300 gpm to ensure a minimum of 50 ppm hydrazine at the spray nozzles.

2.2.3 The chemical added to the containment spray for iodine removal shall be supplied from the hydrazine storage tank.

2.2.4 Disodium phosphate or trisodium phosphate shall be available in the reactor building to provide the required sump solution pH (7.0 - 7.5) within 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> post-accident.

2.2.5 The amount of hydrazine stored in the hydrazine storage tank shall be sufficient to provide continuous injection for at. least 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.

2.3 Sampling Requirements 2.3.1 A sample line shall be provided for evaluating the ccadition of the hydrazine in the hydrazine storage tank. Provisions shall be made for tank drainage and replenishment as required to maintain the correct hydrazine concentret_on in the tank.

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as 2.4 Testing Requirements 2.4.1 Testing shall be as submitted in Subsection 6.2.2.1.4 of the FSAR

. with the exception that Paragraph e will be replaced with appropriate test procedures for the hydrazine pumps.

2.5 Electrical Requirements 2.5.1 The hydrazine pumps are powered from redundant, Class lE, onsite emergency power systems.

2.5.2 All electrical equipment required for the hydrazine pumps shall be designed in accordance with the applicable IEEE standards.

2.6 Instrumentation and Control Requirements 2.6.1 The hydrazine addition pumps shall be actuated by reactor building high-high pressure (30 peig).

2.6.2 The hydrazine storage tank shall provide : remote readout in the control room for the following instrumentation:

a. Redundant level instrumentation which includes redundant level sensors, redundant level indicators, and redundant high and low level alarms. . .

b. Pressure instrumentation which includes pressure sensors, pressure indication, and high- and low-pressure alarms.

2.6.3 'The low level alarms shall be set so that the tank level does not fall below the minimum required to ensure that adequate hydrazine is available for injection into the system.

2.6.4 The hydrazine storage tank shall have a single pressure relief valve to prevent overpressurization and twc redundant vacuum breakers to prevent a vacuum from being induced in the tank.

2.7 Water Chemistry Requirements 2.7.1 The hydrazine shall be stored as a 35 wt% aqueous solution. The net tank inventory shall be sufficient to supply hydrazine to the suction of the reactor building spray pump for a minimum of 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br />.

2.7.2 Disodium phosphate or trisodium phosphate shall be stored in the reactor building for use in neutralizing the boric acid such that the pH of the sump is greater than 7.0 but less than 7.5, 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> post-accident. The chemicals shall be stored in a powdered or granular condition and provisions made for ctorage to ensure that the chemicals go into. solution.

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2.7.3 To determine the pH range of . the eump uolution, the recirculating inventory shall be calculated considering both minimum and eaximum boric acid concentrations and solution quantities for the rollowing:

a. Borated water storage net inventory

b. Reactor coolant system inventory (hot =45 lbs/ft )

c. Core flooding system inventory

d. Net storage inventory of chemicals in 2.7.1 and 2.7.2 above 2.7.4 The hydrazine shall be injected directly into the suction piping of the reactor building opray pump.

2.7.5 The hydrazine concentration in"the solution at the spray nozzles shall be no less than 50 ppm at all times during the hydrazine injection period.

2.7.6 The hydrazine storage tank atmosphere shall be inerted with nitrogen so that the tank contents remain at a slight positive gage pressure during normal storage to prevent air leakage from c,ontaminating or degrading the hydrazine.

2.7.7 All water used to prepare solutions for this system shall be reactor grade makeup water.

2.8' Material Requirements -

2.8.1 Stainless steel shall be the principal material of construction for the entire spray system with the hydrazine storage tank being 304L stainless steel which has been acid etched and passivated to ensure the removal of all residual free iron.

3.0 APPLICABLE NRC REGULATORY GUIDES RG 1.1 Net Positive Suction Head for Emergency Core Cooling and Containment Heat Removal System Pumps RG 1.4 Assumptions Used for Evaluating the Potential Radiological Consequences of a Loss-of-Coolant Accident for Pressurized Water Reactors RG 1.26 Quality Group Classification and Standards 1 RG 1.29 Seismic Design Classification I

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