ML19224B645

Final Rept, Sys Description:Reactor Coolant Makeup & Purification Sys, Ref B&R Drawing 2024,Revision 11

ML19224B645
Person / Time
Site:	Crane
Issue date:	06/30/1974
From:	Metropolitan Edison Co
To:	Mullinix W NRC/IE
References
TM-0421, TM-421, NUDOCS 7906180015
Download: ML19224B645 (76)

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4 FI:AL SYSTE'4 DESCRIPTIO:! (Index !!o. 17) REACTOR CCOLANT MARE-UP AND PURIFICATION SYSTE 1 (B&R Dwg. NO. 2024, Rev. 11) a 4A JERSZY CZlII'RAL POWER AND LIGHT CCMPA :Y THRLE MILU ISLA::D NUCLEAR STATION UNIT !!O. 2 i s Issue Date: June 1974 Prepc.rerl by: M. Ferrante Burns and Roe, Inc. 700 Rinderkamack Road

Oradell, N.J.

07649 i 6

4 _ e 18 E s TABLE OF CCNTENTS FOR REACTOR COOLANT MAKE-UP AND PURIFICATION SYSTK.S Section Pace l.0 INTRCDUCT ION 1 l.1 System Functions 1 1.2 Summary Description of tne System 2 1.3 System Design Requirements 5 2.0 DETAILED DESCRIPTION OF SYSTEM 8 2.1 Comp onen ts 8 2.2 Instruments, Controls, Alarms, and 27 Protective Devices

1 3.0 PRINCIPAL MODES 'OF OPERATION 30 3.1 Startup 30 3.2 Normal Operation 3.3 Shutdown 30 40 3.4 Special or Infrequent Operation 41 3.5 Emergency 45 4.O HAZARDS A':D PRECAUTIONS 47 e

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APPE!!DIY TITLE TABLE 170. Letdown Cooler 1 Seal Return Cooler 2 Seal Injection and Seal Return Filters 3 Make-Up and Purification Demineralizer Filters and 4 Makeup Filters Makeup and Purification Demineralizerr 5 Makeup Tank 6 Makeup Pump 7 Instrumentation and Controls 8 Panel-Mounted Annunciators and Computer Inputs 9

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,a I REACTOR COOLA::T MAKEUP /d:D PUR I F IC AT ICS SYSTEM 1.0 INTRODUCTIOri l.1 Svstem Functions The makeup and purification system provides a means for controlling reactor coolant inventory during reactor power operations as well as maintaining tne water quality and chemistry of the coolant within prescribed specifications. Th:2 system also serves to accomplish the follow ing : a. prov ide s seal injection water to the reactor coolant pumps to establish a primary coolant pressure boundary and to supply pump cooling water: _g b. prov ide s a means of venting radioactive and flammable gases from the reactor coolant system; c. adds makeup water to the core flooding tanks; d. serves a safety features function by injecting high pressure water into the reactor coolant system in the event of a LOCA: e. provides an indica". ion of failed fuel. The makeup and purification system has an inter face with the following auxiliary systems and in conjunction with these systems, performs its primary and secondary functions. (Drawing numbers refer to Burns and Roe, Inc. flow diagrams) : \\ \\ / ' 4

1. 4 a.

Intermediate Closed Cooling Water System (Dag. No. 2029) b. Nuclear Services Closed Cooling Water System (Dwg. No. 2030) c. Chemical Addition System (Dag. No. 2025) d. Radioactive Waste Disposal Systems ( L iqu id, Gas & Solid) (Dwg. Nos. 2027, 2023, 2039) e. Core Flooding System (Dag. No. 2026) f. Decay Heat Removal System (Dag. No. 2026) g. Radwaste Disposal - Misc. Liquids (Dwg. No. 204S) h. Nitrogen for Nuclear and Radwaste System (Dwg. No. 2036) i. Demineralized Service Water (Dwg. No. 2007) 1.2 Sum. mary Description of System (Re f er to B&R Dwg. No. 2024, Rev. ll) During reactor power operations, reactor coolant flow is confined to a closed loop, i.e., through the reactor core, to the steam generators, and back to the reactor. In order to maintain the high degree of water quality required for operation of a

3, ai nuclear reactor, it is necessa;y to continuously pass a portion of the coolant flow through a purification system to remove contaminants which have been picked up in the system.

These contaminants are the result of corrosion of the reactc. coolant system materials, leakage of fi.asion products from fuel cladding defects, and other impur it ie s that may be introduced into the reactor coolant with makeup water. The corrosion products tend to foul the heat transfer surfaces in the reactor core and steam generators, while the Iission products anc the corrosion products which have become irrad ia ted, increase the background radiation levels of the plant and create problems relative to equipment a cce s s ib il i ty. Other impur it ie s such ar, chloride, oxygen, etc., tend to accelerate the rate of material corrosion, and in this manner, have a deleterious effect on the system. Pur i f ica- ~ tion of the reactor coolant is accomplished by continuously passing a portion of the coolant through a demineralizer and filter arrangement after it has been cooled and depressurized " a, to avoid damage to the domineralizer resins. The pur i f-ied water is then directed into the makeup tank from where it is returned

to the reactor coolant system by high pressure makeup pumps. A portion of the purified watcr is alsa directed to the reactor coolant pumps for seal injection and serves to cool the pump seals which operate at very close tcierances. The system also serves to provide a mear.s of detecting f a iled... fuel. This is accomplished by passing a portion of the letdown coolant after it has been cooled and depressurized through a radiation monitor to detect abnormal levels of radicactivity. ~~ (Refer to Radiation Monitoring System Description, Index #52). _Since the system is basically low pressure at the makeup pump suction and returns water to the high pressure reactor system, it affords a method for the introduction of makeup water to the reactor to replenish that which is lost through system f leakage. Makeup water is added to the system dcwnstream of the "3 demineralizers and upstream of the makeup filters and is suppliet from either the domineralized service water system, the bleed holdup tanks or from the deborating demineralizers. Provision is also made at this point for the addition of boric acid and other chemicals. The system also serve: La permit di! tion of the coolant boron concentration. This is accomplis hed by bleeding the reactor coolant from the system after it has passed through the demineralizer, and replacing it with deborated water from the sources previously mentioned. A makeup tank serves as a reservoir for the coolant which is let down from the reactor system and provides the suction and NPSH required for the high pressure makeup pumps. It further serves as a surge tank during changes in reactor coolant inventory and provides a place for the introduction of hydrogen gas into the reactor coolant for oxygen control. During normal . i

~ operation, a specified hydrogen overpuressure is maintained in the tank. Hydrogen, in a gamma radiation field, will combine with free oxygen in the reactor coolant to form water, and thereby prevent the corrosive effects which are caused by the oxygen. When it becomes necessary to degas the reactor coolant of hydrogen, e.g. in prepara cion for refueling or reactor coolant system maintenance, the makeup tank and the pressurizer act as collection chambers from which the hydrogen gas can be vented and replaced with inert nitrogen which prevents corrosion and replaces the potentially explosive hydrogen. The. tank is also utilized to vent radicactive gases which have been expelled Nom the reactor coolant and have collected in the gas space of the tank. These gases are vented to the radioactive gasecus waste disposal system where they are processed before being released to the atmosphere through the yrj station vent. us During reactor shutdowns, the high pressure pumps in the makeup and purification system are used to fill the core flooding tanks with borated water at the refueling concentration by taking suction from either the makeup tank, MU-T-1, or the borated water storage tank, DH-T-1. The horated water is pumped to ecch core flooding tank through a line which is provided from the discharge header or the makeup pumps. During reactor operation, however, any makeup to the core flooding canks is prodded by a positive dioplacc pump in the chemical I addition system since the amount of makeup would be minimal and the boron concentrat.on in the makeup and purification i loop is lowe- _ nan the refueling water concentration. The safety features runction of the system is provided by the injection of high pressure water from the borated water storage n 's j ly . ) i l-

e e tank into the reactor coolant system immediately following a rupture in the system piping. Because of the high discharge pressure capability of the makeup pumps, the borated water can be supplied .o the reactor while the reactor pressure is high and before operation of the decay heat removal system for low pressure injection. In the event of a small reactor coolant system leak where the reactor pressure decreases sicwly and the supply of water _n the borated water storage tank has been exhausted before the decay heat removal system pumps can overcome the reactor pressure to provide icw pressure recirculation frcm rhe reactor build;ag sump, the makeup pumps function to recirculate the spilled ccolant by taking suction from the outlet of tae DHR coolers. In this case, the DFR pumps provide the required NPSH for operation of the makeup pumps. n'i a-1.3 System Des icn Recuirements The makeup and purification system is designed to receive reactor coolant at normal operating conditions, cool and depressurize the water so that it can be purified, and re turn the purified water to the reactor. The piping design conditions (pressure and temperature) are varied throughout the system, as follow s : from the steam generator outlet to the letdown cooler inlet valve, 2500 psig and 650 F; the cooler is designed for 2500 psig and 600 F on the tube side; from the eccler outlet valve to the block orifice, 2500 psig and 300 F; from the block orifice to the makeup tank, 150 psig and 200 F; the tank is designed for 100 psig and 200 F; from the tank to the makeup pumps suction header 350 psig and 300 F: frcm the makeup pumps .S } r i 4

to the check valves inside the secondary shield ing, 3050 ps ig and 200 F-and from the check valves to the reactor coolant piping, 2500 psig and 650 F. The seal return piping from the reactor coclant pumps to the interna l building isola tion valve is designed for 2500 psig and 650 F; between the internal and external building isola tion va lves, 2500 psig and 300 F; while the downstream of the external isolation valve to the makeup tank, including the seal return coolers, the design conditions are 150 psig and 200 F. Dur ing normal steady state power operation, one of the two parallel arranged letdown coolers purificat ion filters, purification demineralizers and makeup filters is in operation for ficw rates up to 70 gym. For higher flCW rates, up to the maximum capacity of the system ( 14_0_ gpm), two letdown coolers as well as both gg} demineralizers and both sets of filters upstream and dcwnstream of the domineralizero, are required to be in service. The reactor coc anc in jicsing through the letdown cooler is cooled from approxima tely 555 F to 120 F with the inlet temperature of the intermediate closed cocling water system at G5 F. The pressure of the coolant is reduced from acproximately 2155 psig to 100 psig by the bicck orifice. At low pressure and if a flow rate in excess of 45 gpm is r equ ir ed, the letdown flow control valve, MU-V5, must be placed in s erv ice. This valve is sized to handle the maximum system flow; hcw ev e r, for normal system operation, onl'y the block orifice is nscassary. One purificaticn demineralizer is required for ficws to 70 gpm; the second demineralizer must be placed in service for nigher letdown ficw rates or when No. 1 resin is exhausted. The demineralizers contain a 2:1 mixture of cation and anion resins and are 99% ef ficient in removing all fission isotopes except xenon, krypton, yttr ium, milybdenum, cesium and tellurium. f I f 4

Chlorides and scdium are also removed, and a small percentage of suspended corrosion products is collected in the resins by a filtration effect. Provisions are incorporated for changing the domineralizer resins by sluicing. Two sets of multi-element type filters,each set consist ing of two filters arranged in parallel.are provided in the letdcwn flow path. The first set is upstream of the domineralizers and capable of removing particulate matter greater than 1 micron with 98% retention while the seccnd set is downstream of the makeup addition lines to the letfown flow, with the same removal rating of 1 micron at 98% retention. Normally, one filter in each set is in service for flow rates up to 80 gpm. The alternate filters are used when the normal filter becomes clogged and requires changing of the elements, or when higher flow rates are required. The makeup tank acts as, a system surge tank, and is stainless

3j a-steel clad with a capacity of approximately 4500 gallons.

A ring header in the tank's water space is provided for the introductton of hydrogen and nitrogen to the system. Three makeup pumps, arranged in parallel with common suction and discharge headers, take suction from the makeup tank. The pumps are multi-stage centrifugal and are rated at 300 gpm at 3000 ps. One makeup pu.,i is in service fer normal operations; the second is utilized as a standby backup fcr the operating pump while the third is normally idle. This provision ensures a separate source of suction from the borated water storage tank and path for discharge to the emergency injection lines l i to provide redundant high pressure injection in the event of an emergency. Two straight-tube design coolers, arranged in paralle!, are pr ov ided to remove the heat from the reactor coolant pumps seal water return and the controlled 3r j 5

bleedoff,before the water is returned to the makeup tank. One cooler is normally in service with the second maintained as a spare. The cooling water flow to these coolers is supplied from the nuclear services closed cooling water system. There are several interlocks and automatic contruls incorporated into the design of the system to prevent damage to equipment rd to provide automatic ficw and pressure regulation. Relief valves are installed on system equipment and piping where overpressurization could result in damage. The interlocks and controls are discussed in greater detail in Section 2.2. 2.0 DETAILED DESCRIPTICN OF SYSTEM 2.1 Components - '~

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Since a portion of the makeup and purification system erves a safety features function, redundant equipment has been provided for emergency operation. This equipment includes the makeup pumps, the emergency high pressure injection makeup valves, and the normal makeup and purification system process isolation valver to and from the reactor coolant system. In order not to degrade the adequacy of the system for emergency use, oniy one of the three makeup pumps may normally be out-of-service at any gi.ven time, and at least one of the two emergency injection valves to each loop must be operable at all times. 2.1.1 Letdown Coolers, MU-C -1 A and MU-C-1B e, ,%) h a

The letde< coolers (sec Table 1) transfer the heat from the letdcwn water to the intermediate closed cooling water system. The coolers are arranged in parallel with remotely controlled, electric motor operated stop valves at the inlet and outlet of each cooler. The cooler inlet valves are interlocked with the corresponding intermediate cooling water ir let valves to ensure a supply of cooling water prior to placing the cooler in service. The cooler outlet valves also serve as reactor buildiag isolation valves. The tube side throuch which the reactor coolant ficws, is formed by a series et 30 parallel tubes which are spiraled eround the major axis of the shell. Cooling water from the intermediate closed cooling water system is directed through the shell in a counterflow te the reamtor coolant. The tubes are designed in accordance with the ASME code classification III-C lethal, and the shell conforms with .n "L: ASME VIII. The design temperature and pressure of the coolers are 600 F and 2500 psig (tube s ide) and 350 F and 200 psig (shell side). 2.1.2 Reactor Coolant Pumo Seal Return Coolers, MU-C-? A a nd MU-C-2B The seal return coolers (see Table 2) d is s ipa te the heat picked up by the reactor coolant pumps' seal injection water in passing through the pumps. The heat is transferred to the nuclear services closed cooling water system which supplies the cooling water. The units are of straight-tube design with the seal return f water passing through the tubes. The tube side is designed in accordance with the ASME code classification III-C lethal and the shell side complies with classification VIII. Remotely controlled electric motor operated gate valves are provided on the tube side and manual gate valves on the shell side for isolation purposes. 7 relief valve on the cooler shell prevents _9-4

4 an inadvertent pressure buildup resulting from an increase in the ambient temperature in the event the cooler is isolated. ,The design tamperature and pressure of the coolers is 250 F and 150 psig for the shell side and 200 F and 150 psig for the tube side. 2.1.3 Seal Injection and Seal Return Filters, MU-F-4A, MU-F-4E, and MU-F-3 Two filters are provided upstream and one filter is provided downstream (see Table 3) of the reactor coolant pump seals. The two upstream filters are provided to protect the reactor coolant pump seals from particulate matter. The filter.assels are designed for a flow rate of 50gpm borated water with a 6.5 psi pressure differential ac;oss the filter. The filter elements are rated at 3 microns nemimal and 23 microns absolute. Manual isolaticn and bypacs valves are provided to permit selec-ma 'l a tion of the s;andby__ (alternate) filter for isolation purposes during cartridge replacement. The downstream filter is provided to keep particulate matter from entering the makeup tank. The filter vessel is designed for a flow rate of 20 gpm borated water with a 1 psi pressure differential across the filter. The filter elements are rated at 20 microns absolute. Manual isolation and bypass valves are provided for isolation purposes during cartridge replacement. 2.1.4 Make-Uo and Purification Domineralizer Filters Filters are provided upstream of the demineralizers to keep active particulate corrosion products from being deposited in the demineralizer beds (see Table 4). The filter vessels con fo rm to ASME code classification III-C lethal and ara [ t

designed for a flow rate of 80 gpm '<ith a 5 psi pressure differential across the filter. The outside diameter of the vessel is 12 3/4 inches and the overall length envelope is approximately 71 inches. The renewable cartridge envelope size i6 inches in diameter by 24.72 inches long. The fii'_ers are fitted with a hinged cover for replacement of the filtering elements. Drain lines from each filter are directed to the auxiliary building sump. A spring is provided for each element to force a seal at the top of the element. The elements are depth-type design affording excellent particulate retention capability and are made of epoxy impregnated organic media with 304 stainless steel core. The filter elements are rated at 1 micron nominal with 98% retention. A re.motely controlled air cylinder operated ((} stop valve (MU-V224A/B) is provided at the inlet to each filter to permit selection of this standby (alternate) filter from the Control Rocm Auxiliary Systems Control Panel Number 3. A manually operated stop valve i= installed in the outlet from each filter for isolation purposes during cart.-idge replacement. 2.1.5 Makeuo and Purification Demineralizers, MU-K-1A and MU-K-1B The letdown domineralizers (see Table 5) purify the reactor l 0 i -10 A - t g 0

coolant after it has been cooled, depressurized and filtered. Each demineralizer is des igned for a flow rate of 70 gpm anc ' complies with the ASME code Classificatior. III-C lethal. The shell diameter is 48 inches and its,overall height is 100 inches. Fif ty cubic feet of mixed bed (2:1 ratio of cation-anion) resin is filled to a depth of approximately 4 feet. The inlet flow is distributed by a header consisting of twelve 3/4 x 18 inch pipes, each having one end plugged. Each pipe has twenty-one 3/16 inch holes. The outlet header is similar, except that the pipes are 3/4 x 20 inches and a 110 mesh stainless steel screen is wrapped around each pipe to prevent resin break through. A fill and removal connection is provided for repbcement of uepleted resin. The spent resin is directed to the spent resin storage tank in the solid waste disposal system. A sampling line leading to the Unit 1 Radio Chemistry Laboratory is provided with a remotely ,4 controlled diaphragA operated valve at the common inlet and outlet of the demineralizers for influent and effluent sampling. In the letdown line upstream of the demineralizers, a temper-ature alarm, set at l35 F actuates an annunciator and operates a switch which closes the external building isolation valve, MU-V3, thereby protecting t'le resins from exposure to excessive temperature. The design pressure of the demineralizers is 150 psig. 2.1.6 Makeuo Filters, MU-F-2A and MU-F-2B The filters downstream of the domineralizers are the same as the upstream filters (see Table 4). They are provided to keep particulate matter and resin fines from entering the makeup tank and being introduced into the reactor coolant and reactor coolant pump seals. The filter vessels conform to ASME code classification III-C letaal and are designed ~;r a flow rate of 90 gpm with a 5 psi pressure dif ferential across the filter. The outside diameter of the vessels is 12 3/4 inches and the overall length . ) t 4

envelope is approximately 71 inches. The removable cartridge envelope size is 6 inches in diameter X 24.72 inches long. The filters are fitted with a hinged cover for replacement of the filtering elements. Drain lines on each filter are directed to the auxiliary building s t, imp. A spring is provided for each element to force a seal at th e top of the element. The elements are depth-type design affording particulate retention capability and are made of epoxy impregnated organic media with type 304 stainless steel core. The filter elements are rated at 1 micron nominal with 98% retention. A remotely controlled air cylinder operated stop valve (MU-VllA/B) is provided at the inlet to each filter to permit selection of the standby (alternate) filter from the main Control Room, Panel Number 3. A manually operated stop valve is installed in the outlet from each filter for isolation purposes during cartridge repiccement. "30 .. a 2.).7 Makeuo Tank, MU-T-1 The makeup tank (see Table 6) functions to receive the puri-fied reactor coolant and makeup water and serves as a surge tank for the reactor coolant inventory control. The outside diameter of the tank measurtz 8 feet with an overall height of approximately 13 feet. The contained volume is approxi-mately 3800 gals. of water with the remainder filled with gas. The tank conforms to ASME code class ifica tion III-C lethal. A lx2 inch relief valve (MU-Rl) set at 100 psig protects the tank from exceeding its design pressure. The inlet line to the tank connects to a nozzle which sprays the inlet water into the gas space. Connections leading to the sampling s ta tion are provided in both the gas and water space. A one inch line leading from the hydrogen end nitrogen supply headers connects to a ring header in the water space to introduce either gas into the tank. . e 4

~ c. 1.1.8 ykeuo Pumns, MU-P-1A, MU-P-la and MU-P-lc The makeup pumps (see Table 7) which inject the coolant from the makeap tank into the reactor coolant pump seals and reactor coolant system are 9 stage, horizontal, gear driven at 6800 rpm, single suction centrifugal pumps, rated dt 3C0 gpm each with a total discharge head of 5545 feet. The pumps are designed for operation up to 3000 psig with a fluid temperature cf 200 F. The makeup pumps will deliver up to 550 gpm at 1600 feet total discharge head during an E.S. cond it ion, dependent u-parameters a.t the time e' the condition. The makeup pumps are normally maintained in pairs with pump, MU-P-lB, always being one of the pair. A switch on control room Panel "". 3 (Auxiliary Systems Control Panet. is provided to select pairing)1U-P-1A with P-1B or MU-P-lC with P-1B. .. - q ~52 A paired set of pumps permits either pump in the pair to be the in-service pump with the other pump in the pair as backup, capable of automatic starting in the event of failure of the in-service pump. Selection of the in-service pump and the backup pump is made by positioning the control switch for the individual pump. The pump selected for service is started by mcVing its control switch to the " Start" position and allowing it to spring return to the neutral (mid) position. The other pump in the pair is then set up for automatic backup by moving its cont'rol switch to the "Stop" p;sition and allowing it to spring return to the neotral (mid) position. Pump MU-P-1A is electrically powered from the 4000v safety features bus 2-lE, while SU-P-lC is powered from the 4000V sa.fety features bus 2-2E. Pump MU-P-1B is capable of being fed from either bus. Two cwitches on Control Rocm Panel No. 3 permit selection of power supply to MU-P-1B from either bus '} I b'

In order to ensure backup capability in the event of pump failure. The three pumps take suction from a common header and discharge into a common header. A manual stoo valve is providad in the suction and discharge line for each pump for isolation purposes and a check valve in the discharge line from each pump is pr ov ided to prevent back flow through an idle pump. Two manually operated stop valves are provided between pumps MU-P-1A and P-1B and between MU-P-lC and P-1B in both the auction and discharge header to ensure the capability of pump isolation. A line from each of two outlets from the borated water storage tank connect at each extremity of the makeup pumps' suction header -(at MU-P-1A and MU-P-lC) to provide a supply of borated a: water for emergency high pressure injection. Each of these lines also connect to a line from the discharge of a decay heat removal pump to provide high pressure recircula tion during a reactor coolant system piping f ailure where the reactor pressure remains higher than the discharge capacity of the decay heat removal pumps. In this case, the decq/ heat removal pumps, which are taking a suction from the borated water storage tank or the reactor building sump (if the borated tank is empty, provide the NPSH for operation of the makeup pumps. If the operating / backup makeup pump pair is selected as MU-P-1A and P-1B then the two isolation valves in both the suction and discharge header between MU-P-lB and P-lC must be closed and the valves between MU-P-1A and MU-P-la must be open. Conversely, if MU-P-lc and P-1B is the selected pa ir, then the two isolation valves in the suction and discharge header between MU-P-1B and P-lC must be closed. Separation of the header's in this manner ensures that there _ r , s

4 are always two independent suction and discharge paths available for emergency high pressure injection. During LOCA conditions, the SFAS will automatically attempt to start MU-P-lC. If a pump is out-of-service, it is impe r,a t ive that the isolation valves in the common suction and discharge headers are properly positioned to ensure two separate paths (one to each reactor coolant loop) for high pressure injection. There are two separate lube oil systems ascociated with each of the makeup pumps; one is for the geared speed increaser, and the other, for the pump and motor bearings. The speed increaser lube oil system consists of a shaf t drivet (main) lube pump, an auxiliary, AC motor driven lube pump in parallel with the shaft driven pump, and oil cooler. Cooling water to the cooler is supplied by the nuclear services closed cooling

1. A}

water system. The tube oil pumps take suction from the increaser lube sump, through a check valve, which maintains the p 'os' prime during idleness, and a strainer. The lube oil pumps d ischarge through the cooler and to the geared speed increaser. A check valve is provided in the discharge of the auxiliary lube pump to prevent back flow when the motor driven pump is not in operation. The be-ring lvbe oil main and auxiliary pumps, like the geared speed change auxiliary pump, start when the control sw itch for the associated makeup pump is pla ced to " Start". A pressure sw itch in the geared speed changer oil system stard the auxiliary pump if the pressure decreases to 7 psig. Lo', lube oil pressure and high temperature is alarmed by the computer. A light adjacent to each makeup pump control switch on Panel No. 3 indicates if the auxiliary pump is running. ' I t, (, 6

The pump and motor bearing lube oil system consists of a main and an auxiliary, AC motor driven lube oil pumps piped in parallel. The pumps take' suction from the lube oil reservoir and discharge into a common line and *hrough a cooler to supply the motor bearings and the pumps's radial and thrust bearings. Drainage from the bearings is returned to th e lube oil reservoir. Cooling water to the cooler is from the nuclear services closed cooling water system. The bearing lube oil main pump runs continuously while the make up pump is in operation supplying bearing lube oil. A pressure switch in this system automatically starts the bearing lube oil auxiliary pump of the bearing lube oil pressure decreases to 5 psig, and stops this auxiliary pump at 15 psig. Indicating lights adjacent to each makeup pump control switch on panel no. 3 indicates the status of the main and auxiliary lube oil pumps. An interlock is proviced to a make up pump start if the motor lube system pressure is not a t least 4 psig and to stop the make up pump if th' lube oil pressure decreases to 2 psig. Low lube oil pressure and high temperature is alarmed by the computer. The 700 h.p. motor which drives the make up pump is supplied with cooling water frcm the nuclear services closed cooling system. A flow s' witch in the cooling water inlet line to each pump's motor cooler prevents the motor Jrom starting i unless 95 gpm minimum of cooling water is being supalied. This interlock is overridden by a signal frcm the SPAS to permit pump start without cooling water during emergency conditions. Low cooling water is alarmed by the ccmputer and aisc annunciated in the Control Room. Motor high temperature is also alarmed by the computer. n s' I __.-lo-4

A two inch recirculation line fitted with an orifice sized for 95 gpm at 6500 ft. 6 p is provided from each makeup pump to regulate ~ bypass fic,w and maintain minimym pump flow for proper pump operation. The recirculated water is returned to the makeup tank through the seal retura coolers. Two normally cpen electric motor operated stop valves, MU-V3 6 and MU-U37, are provided in the common line which connects the recirculation line from each pump to the inlet vr the seal return coolers. Thes. valves are closed upon receipt of a signal from the safety fea t u re d actuation system to achieve the required emergency injection flow during a LCC74 2.1.9 Maior System Valves Letdown Coolers Inlet S ton Valve, MU-V l A /M U-Vl B One 2500 psig, 650"F,2h inch, 316 SS, electric motor operated gate valve is provided at the inlet to each purification ~13 letdcan cooler to permit isolation of the cooler for periodic c! .wover during reactor operation. The valves are inter-Iceked to the respective intermediate cooling wcter supply valves to ensure a supply of cooling water to the cooler pr ior to the admittance of reactor coolant. Remote manual control of the valves is provided from the Control Room, panel nu ber 3. P ower supply to the electric motor valve operators is frcm the 48CV motor control centers 2-32B f'or valve MU-VLA and 2-42B for valve MU-VlB. Letdcwn Coolers Outlet Stop Valve, _ MU-V 2 A /MU-V 2 B One 2500 psig, 600 F,2 inch, 316 SS, electric motor operated gate valve is prosided at the outlet of each puritication letdown cooler to permit inclation of the cooler for periodic changeover during reactor operation. Each valve also serves -L7-m_ 6

~~ as an internal reactor building isolation valve and closes automatically on receipt of an SFAS signal. Remote manual control and indication of th e valves is provided from the Control Room on Panel Number 3 and on containment isolation Panel Number 15. Indication only is provided in Panel No. 13. Power supply the electric motor valve operator's is from the 480V engineered to safety features motor control center 2-11EA for MU-V2A and from 2-21E' for MU-V2B. Letdown Isolation valve, MU-V3 One 2500 psig, 300 F 2 inch, 316 SS,. air piston operated gate valve is provided in *he letdown line just downs tream o f the reactor building penetration. The valve serves as an exttrnal reactor building isolation valve and closes automatically upon receipt of a signal from the safety features actuation system. The valve is interlocked to the letdown temperature instrumentation' string MUS-TE to automatically close the valve if the letdown temperature reaches 135 thercby affording protec-tion against excessive temperature to the purification deminera-lizer resin. Remote manual control and indication of the valve is provided from the Control Rocm on Panel Number 3 and also on Panel Number 15. Indication only is provided in Panel 13. Block Orifice Inlet Ston Valve, MU-V4 One 2500 psig, 300 F 1 inch, 316 SS, air piston operated gate valve is provided at the inlet to the block orifices. The velve functions to provide isolation of the block orifice when use is not required. Remote manual control of the valve is providen from the Control Room, Panel Number 3. Auxi]iarv Letdown Flow Control Valve, MU -V 5 One 2500 psig, 300 F 2h inch, 316 SS, diaphragm operated globe valve is provided in the letdown line around the block orifice d t, t.

to be used citbar alone or in conjunction with the block orifice to provide letdown flow at low reactor coolant pressure. During normal reactor operation valve MU-V5 can be isolated from the flow path by a stop valve upstream and downstream of the flow control valve. Remote manual control of the valve is provided by a hand controller located on panel 3 in the control Rocm. Purification Domineralizer Filters Inlet Stoo Valve, MU-V224A/MU-V2243 One 150 psig, 200 F,2 inch, SS, air piston operated gate valve is provided at the inlet to each purification demineraliztr filter to permit periodic changeover during reactor operation. Remote manual control of the valves is pr ov ided from the Control

Room, panel number 3.

Purification Demineralizers Inlet St_oo Valve, MU-V6A/MU-V6B Ifj Gae i ps ig, 2C0 F,2 inch, 316 SS, air piston operated gate valve is provided at the inlet to each purification demineralizer to permi* periodic changeover during reactor operation. Remote manual control of the valves is provided from the Control

Room, panel number 3.

Letdown Transfer Valve, MU-V8 O n r. 150 psig, 200 F,2 inch. 316 SS, electric motor operated 3 - way selector valve is fitted in the letdown stream between th e purification demineralizers and the makeup filters. The valve is normally positioned such that the letdown flcw is directed to the makeup tank MD-T-1. However, when a change in the reactor :oolant boron concentration is . m' = A

required, the valve position is altered to bleed reactor coolant to the bleed holdup tanks or the deborating demineralizer with boron free water added as make p. The f ollow ing idterlocks are associated with this valve: a. Feed and Bleed Interlock with control rods-feed (adding water '.o purifica tion train) and bleed (let down to bleed hold ur tanks or deborating demineralizers) will cause MU-V8 to be positioned ~ ~ ' to the make up tink ( f eed) or the bibed hold up tanks / the debora ting de:aineralizers (bleed) if the folicving conditions are satis fied; 1. Rod Position Marcin The Boron Feed and Bleed Controller subsystem shall provide an o"tpu _ s ignal tha t shall enable continuous f eed and bleed under the following conditions, if and only if the group rod position requirements (Sec-tion.3 - below) are satirfied: -lj Rod Position Marcin A c t ion (Nominal Rod Position 12.25) Enable feed and + 10" bleed on group withdrawal. Nominal Rod Position 12.25 in. Terminate feed and bleed on group. insertion. (Nomi 1 Rod Position 12.25 Enable feed and in.) - 10" bleed cr.,roup insertien Nominal Rod Position 12.25 in. Terminate feed and bleed on group withdrawal. i t

4 " Enable" means that

e logic circuitry does not initiate an action, but ra ther permits the operator to act.

" Terminate" means that the logic circuitry will initia te an automa tic s top action. The above listed enable and terminate setpoints shall be individually adjustabl:e. 2. Low Power Enable Below 15% neutron power, the Boron Feed and Bleed . Controller subsystem shall enable continuous feed and bleed, regardless of the rod position margin requirements (Section 1 - above), if and only if the group rod position requiren.ents (Section 3 - below) are satisfied. 3. Group Rod Position ,4 The Boron Feed and Bleed Controller will receive two other signa's from the System Logic for the control Rod Drives. These are a single contact closure indi-cating tha t control rod 1, 2, 3 and 4 are 100% 3 (139") withdrawn and a second single contact closure indica ting that control rod group 5 is greater than 25% (34.75" + 2. 2 5 ") withdrawn. The Controller shall allow continuous feed and bleed if and only if both (1) control rod groups 1, 2, 3 and 4 are 100% withdrawn and (2) control rod group 5 is grea ter than 25% with-drawn. It shall not be possible to circumvent these two requirements for enabling continuous feed and bleed. O I U -2 0A - 'n .)

I b. Make up Tank Lcw - Low Level Interlock - causes valve MU-V8 to return to the normal letdown position (flow to makeup tank) should a low-low water level condition in the makeup tank arise,- c. Batch Controller Interlock - causes valve MU-V8 to rebarn to the normal letdcwn position when a pre-determined amount of makeup feed water has been added to the system. Remote manual control of the valve is provided from the Control Room, Panel Number 3. Power supply to tha electric motor valve operator is from the 480V motor control center 2-32B. Makeuo Feed Control Valve, MU-V 9

2 3 One 150 psig, 200 F, 2

inch, 316 SS, diaphragm operated glabe valve is provided in the makeup feed line to the normal letdown flm; line upstream of the make;p filters. This valve serves to control the rate of makeup water (feed) from either the demineralized service water system or from the discharge of the waste transfer pump to the makeup system. The valve is sized to pass a maximum of 140 gpm and is i. terlocked with the batch controller to close when a pre-determined amount of feed has been added " the makeup system. Ramote manual control of the valve ir .ded from the Contral Room, Panel Number 3. Makeuo Fe e< 1 S too Va l*>e, MU-VlO One 150 psig, 200 F, 2 inch, 316 SS, air piston operated gate valve is I rovided in the makcup feed line between the makeup flow contr ol valve and the normal letdown line. The fcllowing interlocks are associated with this valve : b, - 23 B - (,

4 a. Feed a nd Blem Interlock wi"5 Control Rods - normits valve to open when bleed valve MU-V8 is in the normal (feed) or " bleed " position and the following conditions permit. 1) Rod Position Marcin Action (Nominal Rod Position f 2.25 in.)+ 10" Enable feed and bleed on group withdrawal. Norminal Rod Position 1 2.25 in. Terminate feed and bleed on group insertion (Nominal Rod Position 12.25 in.)- 10" Enable feed and bleed on group insertion.

.q

~ Nominal Rod Position 1 2.25 in. Terminate fead and ~ bleed on group with-drawal. " Enable means that the logic circuitry does not initiate an action, but ra*.her permits the operator to act. " Terminate" means that the logic circuitry will initiate an automatic stop action. The above listed enable and terminate setpoints shall be individually adjustable. 2) Low Pcwer Enablg Below 15% neutron power, the Boron Feed and Bleed controller suLeystem shall enable continuous feed and bleed, regardless of the rod p'sition margin requirements (Sec t ion 1 above), if and only if the group rod position requirements (Section 3 below) are satisfied. f k 2

3) Group Rcd Position The Boron Feed and Bleed Controller will receive two other signals from the System Logic for the Control Rod Drives. These are a single contact closure indicating that control rod groups 1, 2, 3 and 4 are not 100% (139") w ithd rawn and a second single contact closure ind icating thc.t control rod grcup 5 is greater than 25% (34.75" + 2.25") w ithdrawn. The Controller shall allow continuous feed and bleed if and anly if both; (1) control rod groups 1, 2, 2 and 4 are 100% withdrawn and, (2) control rod group 5 is greater than 25% w ithdrawn. It shall not be possible to circumvent these two requirements for enabling continuous feed and bleed. b. Batch Controller Interlock - causes valve to close

4 when -a pre-determined amount of feed water has been "S

added to the system. Remote manual con trol of the valve is provided from the Control Room, Panel No. 3. Makeun Filters Inlet Stop Valve, MU-VllA/MU-VllB One 150 psig, 200 F, 2 inch, SS, air piston operated gate valve is provided at the inlet to each makeup filter to permit periodic changeover during reactor operation. Remote manual control of the valves is provided from the Control Room, Panel Number 3. Makeuo Tank Outlet Stop Valve, MU-V12 One 350 psig, 300 F, 4 inch, SS, electric motor operated gate valve is provided in the outlet from the makeup tank. Remote manual control of the valve is availabl-in the Control Room .i ' " ,jg _ 4

at Panel Nuarer 3. Power supply to the electric mots-valve . operator is from the 480V motor control center 2-42B. Emercencv Hich Pressure Makeup Iniection Isolation Valves, MU-V16A, MU-V16B, MU-V16C and MU-V16D Cne 3050 psig, 200 F, 2h inch, 316 SS, electric motor operated globe valve is provided in each of the four emergency.eacto_ coolant makeup injection lines. These valves serve as high pres- ~ sure injection valve and open automatically upon receipt of a signal from the safety features actuation system t, provide emergency high pressure makeup injection to the reactor. Remote manual control and indication of the valves is available from the Control Room on Panel Number 3 and also on Panel Numbe-15. Light indication only is provided in Panel Number 13. Power supply to =>; the electric motor valve operators is from the 480V engineered safety features motor control centers 2-llEA for MU-V16A and MU-V16B a r.a from 2 -21 EA for MU-V16C and MU-V16D. Reactor Coolant Svstem Makeup Flow Control Valve, MU-V17 One 3050 psig, 200 F, 2 inch, 316 SS, diaphragm operated globe valve is provided in the normal reactor coolant system makeup line for makeup flow control. The gxtent of valve opening is automatically controlled by the pressurizer level controller RCl-LIC. Remote manual conttu. of the valve is provided frc-the Control Room,- Panel Number 5. i Reactor Coolant Svstem Makeuo Stoo Valve, MU-Vl8 One 3050 psig,200 F, 2 inch, 316 SS, air piston operated gate valve is provided in the normal reactor coolant system makeup line downstream of the makeup ficw control valve. The valve serves as an external reactor building isolation valve and - / l' a

closed upon receipt of a signal from the engineered safety features actuation system to discon tinue normal makeup inject on during accident conditions. Remote manual control and indication of the valve is available from the Control Room on Panel Number 15. Indication only is provided in Panel Number 13. Total Seal Flow Isolation Valve, MU-V20 One 3050 psig, 200 F. 4 inch, 316 SS, air piston operated gate valve is providet in the common line which feecs the four individual reactor coclant pu.mp seal inject on lines. The valve serves as an external reactor building isolation valve. The air piston valve is actuated via dual operated pilot solenoid valves to guard against loss of one essential power source. Remote manual control and indication of the valve is available from the Control Room at Panel Number 3. Indication only is provided in Panel Number 15. ,4 'M Total Sea' Return Internal Isolation Valve, MU-V25 One 2500 psig, 300 F, 4 inch, 316 SS, electric motor operated globe is provided in the common seal return line from the reactor coolant pumps. The valve serves as an internal reactor building isolation valve and closes automatically upon receipt of a signal from the safety features actuation system. Remote manual control and indication of the valve is available from the Control Room on Panel Number 3 and also on Panel Number 15. Indication only is provided in Panel No. 13. Power supply to the electric motor valve operator is from the 4807 engineered sa fety features mo tor control center 2-21EA. Total Seal Return External Isolation Valve, MU-V-26 ~ One 2500 psig, 300 F, 4 inch, 316 SS, air piston operated gate valve is provided in the cc mon seal return line frcm the reactor coolant pumps. The valve serves es an external. n (- 0 s

4 reactor building isolation valve and closes automatically upon receipt of a signal from the safety features actuation system. Re. Tote manual operation and indication o f the valve is available from the Control Room on Paoel Number 3 and also on Panel Number 15. Indication only is provided in Panel Number 13. Reactor Coolant Pumo Seal Plow Control V71ve, MU-V32 One 3050 psig, 200 F,4 inch, 316 SS, diaphragm operated globe valve is provided in the tocal seal ficw injection line to the reactor coolent pumps. The valve is normally set to pass cpproximately 32 gpm (8 gpm to each RC pump seal) and is entomatically controlled by MU-9-FIC. Remote Manual control is provided from the Control Room Panel Number 3. -A "L Individual Seal Return Isolation Valves, MU-V33A, MU-V33B, MU-V33C, MU-V33D One 2500 psig, 650 F,1 inch, 316 SS, electric matcr operated gate valve is provided in each individual seal return Line from the four reactor coolant pumps. The f ollow ing interlocks are associated with these valves : a. Loss of Seal Injection and ICCW Flow Interlock - causes valve to close automatically on coincident low seal injection ficw and loss of intermediate closed ccol.ing water flow: b. Loss of Seal Injection on Idle Pump Intericck - causes valve to close on coincident low seal injection flow if respective reactor coolant pump is idle; Remote manual control of the valves is available from the Control Room ac Panel number 4. Power supply to the " [g L

electr ic motor valve operators is from the 480V motor control centers 2-32B for valves MU-V33A and MU-V33 B tr.f from 2-42B for valves MU-V33C and MU-V33D. Seal Return Coolers Inlet and Outlet Stoo Valves, MU-V166A/ ML-V166B and MU-V167A/MU-V167B One 150 psig, 200 F,4 inch, 316 SS, el'ectric motor operated gate valve is provided at the inlet and at the outlet of each seal return cooler for periodic changeover during reactor operation. Remote manual control of the valves is available in :ne Cor. trol Room at Panel Number 3. Power supply to the electric motOL valve operators is from the 480V motcr control centers 2-32A for valves MU-V166A and MU-V167A and from 2-42A for valves MU-V166B and MU-V167B. ~ Makeuo Pumps Recirculation Isolation Valves MU-V36 and MU-V37 o Two 3050 psig, 200 F,2 inch, 316 SS, electric motor operated ga ce valvas are provided in the common makeup pumps rec ircula t ion line to the seal return coolers inlet line. These valves close automatically upon receipt of a signal from the safety features actuation system to ensure full makeup pump discharge capacity for emergency high pressure injection. Remote manual control of the valves is ailable from the Control Rocm cn Panel Ntaber 3. Power supply to the electric motor valve operators is from the 480V engineered safety features motor control conters 2-ll:A for valve MU-V36 and 2-21EA for valve MU-V37. L. 4

a. 2.2 Instruments, Controls, Alarms and .;tective Devices Instrumentation and controls for the makeup and purification system (see Table C) are provided for the following functions: 1. Control of the reactor coolant inventory by (1) Contrclling reactor coolant letdcwn ficw by ficw-restricting orifice and remote manually positioned fl.cw control valve. (2) Controlling reactor coolant makeup ficw by regulating the flow control valve from the precsurizer level ind ic a toi'-c ontr olle r in the reactor coolant system. ,j .a a 2. Manual remote control of the letdown cooler isolation valves from the control room console. 3. Monitoring of letdcwn ficw and indication of ficw rate on the cont.>ol room censole and by the computer. 4. Letdown temperature is monitored and indicated on the control room console. High-temperature alarm is monitored by computer and annunciator. The high tempe rature alarm is also utilized to trip the letdown isolation valve, MU-V3, closed. 5. The letdcwn high pressure alarm is monitore1 by computer and annunciator. m. v - 2 '/ - 2

6. Control of the reactor coolant pump seal injectior flew. 7. Total seal injection flow is monitored and indicated on the contral room console. High and low flows are alarmed. The total flow signal is also ut'ilized to control the seal control valve (MU-V 3 2 ) to pass a preset ficw to the reactor coolant pump seals. 8. Monitoring of individual reactor coolant pump seal injection flow with control room console indication and low alarm. The individual flow signals are also interlocked to the respective reactor coolant pump motor to prohib it pump start without sufficient flcw and also to close the respective seal return >alve on Icw flcw.

.: )

9. Iiormal makeup-flow ~ (to outlet of RC-P-1A) is monitored ~ ~" and indicated on the controt con. le and high ficw is alarmed by an annunciator.

10. Emergency high pressure injection flows (to inlet of RC-P-1A,2A,LB,2B) are monitored and indicated in the control room with high and low flow alarms an nunc ia t ed.

The low flow alarms are interlocked to the safety features actuation system to be operable only when the safety system has been actuated. Ll. The seal return ficw from each reactor coolant pump is monitored by the computer. High flow is alarmed by annunciator. W a

4 r,- 12. Filter differential pressures are monitored and indicated on the control room console. High differential pressures ~ .are alarmed by the computer and anntr.ciator. 13. Various valves and pumps are manually contrclied from the control room console. 14. The boric acid and demineralized water-makeup system is composed of basically four subloops (Interlock Systems): a) valves MU-V8, and b) MU-V-10, c) MU storage tank level, - and d) MU tank fluid flow. Reference B&W " Feed and Bleed Report" for TMI Unit 2, dated October 1971 for a de* ailed description of the system operation. Basically, the system _ operates in the following manner: 93} Valve MU-V8 is a three-way valve which has tvo operating positions -- bleed (flo's to bleed holdup tank or deborating demineralizers) and normal (letdown flow to the makeup tank). ' Valve MU-V10 is an "On-Off" velve for controlling chemical or makeup feed to the MU storage tank. The operator, using switch MU-V10-MlS, can open the valve, if any of the following are required: 1. Demineralized Water 2. Make-Up from Reactor Coolant Bleed Holdup Tank. 3. Boric Acid 4. -Deborating Demineralizer Outlet , A listing of panel-mounted annunciators and camputer inputs is given in Table 9. ~ ..s .e. . / 0 f .c V J 4

.3.0 l PRINCIPAL MODES OF OPERATION 3.1 s y.a r tup Startup of the makeup and purification system consists of insuring all lines and components ar,e ' filled with borated water and all air is ve: ted frcm the system. In addition cooling water is lined up to al.' coolers and resin effi 'iency is determined for the make-up and purification deminera_.2ers. All electrical power supplies are energized and a complete ctart-up valve line up is completed. Interlocks to all valves and pumps must be verified. 3.2 Normal Ooeration During normal makeup and pur_fication system operation, reactor coolant _is_ drawn _ from the reactor "A" loop at the uqd aa steam generator outlet and is cirected to the tube side o' of a letdown cooler, eith - MU-C-1A or MU-C-1B. The two l letdown coolers are arranged in parallel with one cooler normally in service for letdown flow rate up to 70 gpn. The second cooler is utilized as a spare or to accommcdate higher flow rates up to a maximum of 140 gpm. Electric motor operated stop valve s,MU-VlA and MU-V13 at the inlet to each cooler and MU-V2A and MU-V2B at the cooler outlets provide for remote m^inual cooler isolation. The inlet valve j i to each cooler is interlocked with the intermediate cooling water inlet valve to ensure a ficw of cooling water prior to placing the cooler in service. The intermediate cooling water manual outlet control valve from each cooler is l normally in an open position to prevent a pressure buildup in the cooler shell. In passing through the coulers, the letdown coolant is cooled from operating temperature to approximately 120F with the heat being transferred to the .',s h' t 4

intermediate closed cocling water systea. The outlet of che coolers connect to a common line which exits the reactor bu ild ing through penetration R-541. Downstream of the - penetratien, a remotely controlled air cylinder operated valve, MU-V3, is provided for building and system isolation. The cooled letdown water then ficw's through a pressure break-down device where the pressure is reduced from,ormal operating to approximately 100 psig. Three pressure reduction devices, arranged in parallel, are provided; a block orifice (MU-1-FE), a remotely operated contol valve (MU-VS), and a manual throttle valve ( FU-V. 0 0 ). The block orifice is the normal pressure reduction device for flow rates up to 45 gpm. For higher - flows up to the maximum of 140 gpm, at startup and low pressure conditions, the control valve must be used. The control valve may be 'ised alone or in conjunction with the block orifice. The manual throttle valve is used only when maintenance is Je being ps rformed on'the' block orifice or remote control _ valve, or during shutdown conditions. The bicck orifice is isolated at the inlet by remotely controlled air cylinder operated valve, MU-V4, and at the outlet by a manual stop valve, MU-V102. The control valve is provided with manual stop valves, MU-V101 and V103, at the inlet and outlet respectively. A temperature element in the letdown line downstream of the pressure breakdown devices is provided to indicate temperature and to alarm on a high temperature of 135F. The element also transmits an ele $trical signal which within 4 seconds closes I the air cylinder operated bailding isolation valve MU-V3, if this temperature (135 F)is reached. This interlock serves to prote'ct the demineralitet resins from excessive temperatures I which could cause the resins to become rapidly degraded. The saturation level of the demineralizers for boric acid will be attained after approximately one day of operation with normal i .N~ l ~31- ~ w

letdown flow. The letdown flow normally passes through one of the two filters MU-F-2A and 2B followed by one of the two purification demineralizers MU-K-lA and 1B which are arranged . in parallel. The filters remove suspended solids and the i domineralizers, serve to purify the coolant by removing soluble f corrosion and fission products and other impurities from the reactor coolant. At the inlet to each filter a remotely controlled air cylinder operated valve, MU-V224A and MU-V224B, is provided for isolation. The filter outlets are isolated by manual stop valves, MU-V225A, and MU-V225B. A by-pass linefitted with manual stop valve MU-V226 is provided around the filters. The filters serve to prevent active corrosion ~ products from being deposited in the demineralizer beds.

Normally, one filter is in service for flow rates up to 80 gpm; the second filter is utilized as a spare foi use when the normal filter becomes plugged or when flow rates greater than 80 gpm are

.;ga ad re quir ed. The'fl'ow out of the purification and deborating filters, then passes a " branch to the nuclear sampling system, to the inlet of make-up and purification demineralizers. At the inlet to each demineralizer, a remotely controlled air cylinder operated valva MU-V6A /MU-6 8, is provided for isolation. Such demineralizer outlet line is fitted with a stop check valve, MU-V107A.MU-V107B, to prevent reverse flow. Sample lines leading to the nuclear sampling '~ station are connected to the common demineralizer inlet line and to the common outlet to provide influent and effluent I sampling capabilities. Periodic sampling and comparison of the influent and effluent chemistry and radioactivity test results, indicates the purification capability of the resin as 'k well as the quality of the reactor coolant. Each demineralizer can accommodate a flow rate of up to 70 gpm. The second .L;. ~ ?

demineralizer will be placed in service at higher flow rates or when the first dcmineralizer resin has been exhausued. The letdown fl_ow, af ter passing through the demineralizer, is directed to a remotely controlled, electric motor operated, three-way volve, MU-V8. The normal posicinn or this valve is j { such that the demineralizer effluent is directed through the j makeup filters and subsequently into the makeup tank. If, however, a change in the boron concentration in the reactor coolant is required, the position of the valve can be remotely transferred to direct the letdown flow to the liquid radwaste disposal system where the borated coolant is either retained in a bleed holdup tank or passed through a deborating demineralizer ~ and returned to the system through a makeup line. The makeup line connects into the letdown piping downstream of the three-way valve. Makeup to the system is available from four. sources: the s ta tion domin2:alized water system; the bleed holdup tanks; boric acid pumps;' and, 'from the debora ting demineralizers. ggg Dilution (bleed) and makeup control are discussed in detail at the conclusion of this sub-secti Downstream of the demineralizers, the flow is directed through one of two filters, MU-F2A and MU-F2B which are arranged in parellel. At the inlet to each filter, a remotely controlled air cylinder operated valve, MU-VllA. or MU-VllB is provided for isolation. The filter cutlets are isolated by manual stop valves MU-V132A or MU-V132B. A by-pass line fitted with manual stop valve MU-V149, is provide'd around the filters. The filters serve to remove suspended solid particles that passed through the demineralizer and also prevent resin fines which may be carried over with the demineralizer effluent rrom entering the reactor or the reactor coolant pump seals. Normally, one filter is in service for ficw rates up to 80 gpm; the second filter i ie utilized as a sparc for use when I the normal filter becomes plugged or when flow rates greater I than 80 gpm are required. a' 3' i- . l e-

(-

A

i _v- ~- From the filters, the coolant flows to the inlet of the make-up tank, MU-T-l. Up to the inlet pipe connection, all major process piping in the system is 2 inch size. Between this connection and the makeup pumps discharge header, the piping size is 4 inch with the exception of the nakeup pumps ' suction 1 pipes and header which is 6 ihch size. The coolant is sprayed i into the gas space of the nakeup tank to release gaseous fissio.1 products entrained in the water and to increase the potential for hydrogen saturation. The average water volume in the tank during normal operation is approximately 3800 gallons. Makeup water is added to maintain the tank level between 35-96 inches. _ A hydrogen overpressure of 15 psig is maintained in the tank to provide a concentration of 15 to 40 cc/kg hydrogen in the reactor coolant system. Hydrogen gas is introduced into,the water, space througn a ring header which connects to a line from the hydro. gen _ manifold. Two self-actuated control valves, 93j MU-V29A and MU-V29B, connected in parallel are provided at the hydrogen manifold for pressure regulation. Manual isolation valves are provided upstream and downstream of the regulators for isolation. In the common line between the regulators and the tank, a solenoid operated stop valve, MU-V28, and a check valve (MU-V171) in series, are provided. Provisions for nitrogen addition to the tank during reactor shutdown is made through the same gas addition line. A line from the plant nitrogen storage system connects through a solenoid operated stcp valve, MU-V27 and a check valve MU-V170 to the gas addition line. Nitrogen supply during normal operation is isolated by the solenoid valve and various _other valves in the nitrogen supply system. Sample lines leading to the sampling station are provided from both the gts and water space. If the tank water evel falls to a pre-set low-lcw limit with the bleed . 0 i\\ J g,. O -.--.--...--..e

.o 1 control valve MU-V8 in the bleed position, an electrical signal automatically transfers the valve to divert the letdown flow through the filter and into the tank. When required, the makeup rank is vented through remotely controlled air cylinder I operated valve MU-V13 and manual th' ottle valve MU-V136, via r tna gaseous radoaste disposal system to remove non-condensible gases. A drain line leading to the liquid radwaste disposal system and fitted with a manual throttle valve MU-V169 is provided. The makeup tank can be isolated if required, by a manual stop check valve, MU-V133, at the inlet and by a remotely controlled, electric-motor cperated valve, MU-V12, _ at the outlet. A by-pass 14.ne to the discharge header of the makeup pumps is provided around the tank to allow for makeup and chemical addition to the reactor coolant during reactor shutdowns. ,,2 The makeup pumps, MU-P-LA, P-1B and P-lC take suction from the makeup tank through a tank outlet line which connects to the common suction header for the pumps. The pumps are arranged in parallel anc' each has a manual stop valve at the suction, and a check and..,nual stop in series at the discharge. Two manual valvas in set as are provided in both the suction and discha'rge header between pumps MU-P-1A and P-1A and between pumps IIU-P-1B and P-1B and between pumps MU-P-1B and P-lC. The outlet line from the makeup tank connects to the suction header at pump MU-P-1B. Depending dron which pump is in service, the double isolation valves in the ccmron suction and discharge headers must be open between MU-P-1B and the in-service pump or, if MU-P-la is in service, with its paired pump. The double valves in the common sucticn and discharge header for the third pump must be closed to ensure header iso?.aticn and thereby c. ...I ~j d ~. ~ - d

Aw 1 ,,.. r 2 redundancy for high pressure injection. The arrangement of valves and piping at the pumps permits flexibility in operating , either of the pumps for normal service, (should one pump be incapacitated because of maintenance) while still ensurirg that at least two of the p2mps are'available to provide the safety features function of the system. The common suction header at pumps MU-P-1A and P-lC is connected through separave lines with the outlet from the borated water storage tank and the outlets from the decay heat removal coolers. These lines provide a source of water from the borated water storage tank for emergency high p essure injection, and high pressure ~ recirculation from the reactor building sump via the decay heat removal system. During normal power operation, the makeup pump discharge is gqq ~ directed throu' h'Evo paths. One path is through a diaphragm g operated control valve, MU-V17, in a 2 inch line leading to the reactor coolant system. The extent of valve opening is controlled by the pressurizer level instrumentation and makeup is automatically added to the coolant system to maintain a constant level in the pressurizer. A by-pass line is provided with a flow indicator, upstream shutoff valve MU-V233B and a downctream shutoff valve MU-V233A, around the makeup control valve, MU-V17. The purpose of this bypacs is to provide a small flow of water at all times through the makeup line although the normal makeup is not required because of a transient operating condition resulting in a high presaurizer water level. The bypass flow maintains adequate circulation to keep the piping in the vicinity of the ~ r.1keup injection nozzle sufficiently cool and prevents thermal [ } ~,)i s ' l '- e.

a5 A e, m-i shock when norn.al makeup is resumed. The bypass valving must be regulated to pass 1 gpm of water through the makeup line. The local flow indicator is provided to set and monitor correct flow. Flow through the normal makeup path enters the reactor building through penetration R-572 and enter,s the reactor coolant piping downstream (at the discharge) of reactor coolant pump RC-P-1B, A stop check valve is provided inside the secondary shield to prevent reverse flow and permit isolation. The flow control valve is provided with manual isolation valves at the inlet and outlet. A by-pass line with a throttle valve MU-V155 for manual contr is also fitted around the control valv-. A remotely controlled ~ air cylinder operated isolation valve MU-v18 is provided downstream of the control valve and by-pass for building isolation purposer. The se.cond flow path from the discharge of the makeup pump is -.a through a remot'e mahual' diaphragm operated flow control valve, '~ MU-V32, which provides seal inj ect ion water ts the reactor coolant pumps. The control valve is set to supply a total of 32 gpm to the seals; 8 gpm per pump. Manual stop valves at the inlet and outlet of the control valve are provided for isolation; a bypass fitted with a throttle valve (MU-V160) is provided around the control valve for manual control. Seal water then passes s through one of two, parallel, seal water supply filters (MU-F-4A and MU-F-4B) for added protection for the reactor coolan,t pump seals. Each filter is supplied with a 2-inch manual inlet and outlet valve, MU-V 34 2 A,, MU-V342B and MU-V343A, MU-V343B, respectively. A 2-inch common, manual bypass valve (MU-V3 50) is provided around the filters. Additional information about the filters is supplied by B&W, the filter suppliers. The seal injection line is a 2 inch line from the discharge header of the seal ~ water filters. which discharges into four 1 inch lines, one to each reactor coolant pump. ~ b. L - 4

~ s 2 ~ _,~~3..___,.c- - -~. p The P anch line to each reactor coolant pump seal is provided with a manual needle type valve to balance the flow to 8 gpm in each line. The seal injection lines enter the reactor building through penetrations R-573, 574, 575 and 576. A remotely controlled, air cylinder operated vilve, MU-V20, is provided in j the common line outside the reactor building for isolation while a stop check valve in each of the branch lines provides for isolation inside the building. With the normal seal injection ficw of 8 gpm, 6.? gpm enters the reactor coolant system as in-seal leakage, while 1.1 gpm is returned to the makeup tank via the seal return coolers. The seal return coolant or controlled bleedoff is directed from each reactor coolant pump through a 1 inch line fitted with electric motor operated gate valve MU-V33A/B/C/D. Each valve is interlocked to close upon loss of seal injection to the respective pump with an attendant loss of intermediate cooling water to that particular pump, and also upon loss of seal injection to an idle pump. A ! rotometer is provided in each seal return line to measure the In-see. leakage is determined by 1 flow from each pump seal. noting the dif ference between the seal injection ficw to each pump and the seal return (controlled bleedof f) from each pump. The four seal return lines connect to a l inch common line which exits the reactor building through penetration R-545D. Upstream of the building penetration, remote manual electric motor operated I stop valve, MU-V25, is provided for isolation; remote manual, air cylinder operated valve, MU-V26, serves as the isolation valve outside the bu ilding. The air cylinder operated valve is actu ated via dual operated pilot solenoid valves to guard against loss of 1 \\ ane essentici power source. Both valves close automatically upon from the safety features actuation system to receipt of a signal prevent an outflow of reactor coolant from the building. Past the building penetratior, the seal return coolant then flows through b ~,i 4

Ja -= s 1 a 1-inch manual inlet isolation valve (MU-V334), a seal water return filter (MU-F-3), and another 1-inch manual outlet isolation valve (MU-V3 3 5). The filter is also fitted with a l-inch manual bypass valve (MU-V333) which is used during { ~ maintenance or emergency. The coolant then flows to the tube I side of of one of two seal return coolers, MU-C2A/NU-C-2B before joining the inlet line to the makeup tank. Cooling water to the shell side of the seal return coolers is supplied ~ by the nuclear services closed cooling water system. Each cooleris supplied with a 4-inch, remote, motor operated inlet - and outlet isolation valve (MU-V166A, MU-V166B and MU-V167A, MU-V167B, respectively). --v2 Chemical addition for ' reactor coolant pH control is made routinely. Lithium hydroxide (LiOH) is added to maintain the pH of the coolant within pre-established limits during reactor operation while hydrazine is used for oxygen scavenging during reactor shutdowns. The chemical pumps in the chemical addition system pump chemicals through independent lir.es into the letdown flow upstream of the makeup filters and are introduced into the reactor coolant with the normal makeup flow. Chemical addition is a manual operation and the amount of chemical added is determined af ter laboratory analysis of the reactor coolant. e l\\ ^ b -sea-w

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L i; 2n.j. _ -.. -z Changes in the reactor coolant borou concentration are made as required. There are two methods available to reduce 'the boron concentration; the bleed and feed method, 'and, the deborating demineraliz.r method. Normally, the bleed and feed method is used when the boron concentration in the reactor coolant is greater than 190 ppm while the deborating demineralizers are used with boron concentrations less than 190 ppt.. The bleed and feed method takes the letdown ficw from the outlet of the purification demineralizer through the three-way valve, MU-V8, and directs the ficw (bleed) to a bleed holdup tank in the liquid _radwaste disposal system. Demineralized water from the demineralized service water system is introduced through a diaphragm operated ficw control valve, MU-V9, a batch controller and an air cylinder operated valve, MU-V10, into the normal letdown line upstream of the makeup filtets. This cej ~ m water becomes the nakeup for the reactor coolant system. Using the deborating demineralizer, the flew is essentially the same except that the letduwn, instead of being directed to a holdup tank, is passed through a deborating demineralizer after which it is retrrned to the letdown piping through the makeup line. Since the return flow rate, in this case, is the same as the bleed flow, the water enters the makeup line downstream of the flow control valve MU-V9, passing through only the batch controller and the air cylinder. operated valve, MU-V10. The amount of deborated water added to the makeup system by either method may be controlled manually, using the three-way valve, or automatically, by pre-setting the batch controller for the desired amount. To prevent an inadvertent excessive dilution of the reactor coolant boric acid concentration, three safety measures are ~ f' f.J UU _' -4 - ~, -

i .a1 _g..... s.. - i applied to each of tha two dilution methods. The first measure is a limitation of 140 gpm on the maximum addition rate through .I. } thu flow control valve, MU-V9, and the provision fc. pre-setting the desired flow. The second measure is an interlock between the shim (regulating) control rod. group position and the three-way valve, MU-V8, which either permits or prohibits dilucion depending upon the nominal regulating control rod group positions. The third measure consists of automatically returning the three-way transfer salve to the normal letdovii position when the pre-set quantity of dilution water has ps ssed through the batch controller. To increase the boron concentration in the reactor coolant, concentrated acid from the chemical addition system is added to the letdown flew and introduced into the reactor coolant

?d with the mak 3up water. _

aa Boric acid may also be added from the reclaimed boric acid tank. The amount of boric acid added is regulated by metering pumps at the boric acid source. It may be added directly to t!.e letdcwn flow upstream of the filters or may be directed through the makeup line in which the batch controller is fittad. All lines in the system used to transfer concentrated boric acid are heat traced to preclude precipitation and subsequent solidification within the lines. 3.3 Shutdown l No special provisions are necessary during system shutdown except that all lines and components must remain filled with borated water. Due to the function of the system, it will never be shutdown while the reactor is operating. When the reactor is shutdown, makeup and chemical addition to the reactor coolant system is supplied from the normal sources into the letdown line upstream of the makeup filters. The m y ! ' ' ' ' ~ ~ - b- ~ ~ 1 J _,,,m,-~ 6

n , -. ~ ~ 4=-. flow, however, can bypass the makeup tank and can be directed .into the discharge header of the makeup pumps from where it enters the reactor coolant system via the normal makeup line. The driving force for the additions is provided by the respective chemical addition pumps, reactor coolant system pressure or the boric acid pumps. During periods of system shutdown, the makeup tank should be maintained at the normal water level with a nitrogen overpressure in the gas space. 3.4 Special or Infrecuent Operation _ Mak eup from the boric acid pumps to the makeup stream,directly upstream of the makeup filters, may be used through a 1 heat traced line, a1 " manual valve MU-V127 and a 1 " check valve MU-V325, to bypass the normal makeup path. ~ 2:Y ~ Provisions have been incorporated into the design of the system to add makeup to the core flooding tanks to adjust the water level or the boron concentration in the tanks. A one inch line fitted with a restricting orifice and manual throttle valve, MU-V168, is connected to the discharge header of the makeup pumps and branches i- .o two 1 inch lines each leading to one of the core flooding tanks. Manual stop valves, MU-V179A and MU-V179B are provided in each branch tine for isolation. This method of makeup addition is used during reactor shutdowns. Another line, from the discharge of the core flooding tank makeup pump in the chemical addition system, connects to the common line before it branches to each core flooding tank for addition of makeup during reactor operation. Provision has also been made in the system design to replace the resins in the purification demineralizers, or the filtering e f i-4

.5 5 a . :n _. _m s s ~.' - i i elements in the makeup system fD.ters without disrupting normal system operation. Each demineralizer is fitted with a sluicing outlet which connects to a 2 inch line leading to the spent resin storage tank in the solid radwaste disposal system. To change the resins, the demineralizer, either MU-K-1A or MU-K-1B, is isolaced from normal service with the alternate demineralizer serving to perform the purification function. After appropriate valv ing in the radwaste system has been established, the resins fluidized by back ficwing demineralized water through the are effluent line into the demineralizer through air cylinder operated valve MU-V292A/B. The electric motor operated sluicing valve, MU-.sdA or MU-V108B is opened and demineralized water from the station demineralized water system is introduced into the unit through air piston operated valve MU-V285A or MU-V285B in the service line. _A bypass line provided with a diaphragm 513 . m.a operated valve (MU-V238A/MU-V238B) is fitted around the electric motor operated valve for each demineralizer in the event of motor operator failure. The spent resin is then discharged to the spent resin storage tank. When the resin has been removed, the demineralizer is flushed with demineralized water and drained. New resin from the resin addition tank in the liquid radwaste disposal system is added to the unit through diaphragm operated valve MU-VlllA/MU-VillB in the resin fill inlet connection provided on each demineralizer. When the appropriate amount of resin has been added, the resin fill valve MU-VlllA or MU-VillB is closed and the unit is filled with demineralized water and vented of air. .'l The elements in the makeup filters are changed by isolating the filter, either MU-F-5A or 2A or MU-F-5B or 2B, from normal service with the alternate filters providing the filtration function. The unit is then vented and drained through the 42- - { {,,, p .-e

a{ 4 p _w - ._m 1 - 7 respective filters drain line to the auxiliary building . sump tank. The hinged cover is loosened and raised, and the basket containing the filtering elements is removed. A replacement basket with new elements is placed into the unit and the cover icwered and fastened. The drain valve is then closed. Letdown water should be carefully introduced into the unit with the vent open until all air has been expelled. If a makeup pump is out-of-service for any reason, it must be ensured that the common suction and di -+- ge headers are ~ properly valved so that each one of the serviceable pumps is capable of providing high pressure injection to one loop. In this case, the backup selector switch must be in the " locked out" position. . -> 4 ~ q During normal plant operation it may become necessary to vent the pressurizer vapor space to expel unwanted gases. This venting or degassing operation is used to reduce'the amount of radioactive gas in the pressurizer vapor space or to reduce the amount of dissolved gas in solu; on of the primary coolant. The flow path during degassing operation is from the pressurizer vapor space, to the nuclear sampling system (Ref B&R Dwg. 2031 ). Caseous flow in the nuclear sampling system through the pressuriner sample cooler, by-passes the sample " bomb" in the sampling system, through three parallel needle valves, and enters the makeup " stream" down stream of MU-V8 and upstream of the make up filters through a h" pipe and a check valve MU-V313. This excess gas in the makeup tank is vented to the vent gas header through 1" vent valves MU-V13 and MU-V136. '. ( .a

1 i =.--.: 2,x :- _ ~ . = - _ 4. ~ The excess hydrogen which is maintained in the makeup tank is added through a pressure control valve (MU-V29A cr ~ MU-V29B), a solenoid operated valve (MU-V-28) and a check valve (MU-V171) from the Nuclear Plant Hydrogen manifold (Ref. B&R dwg. 2036). Hydrogen makeup is' controlled by cycling hydrogen valve (MU-V28 ) to increase the hydrogen partial pressure in the makeup tank, which in turn will increase the hydrogen concentration ( c/kg) in the reactor coolant. Frequency and duration of hydrogen addition is determined by periodic sampling as specified in the IMI chemistry manual. Operating the makeup system with greater than seventy (70) GPM, letdown flow will necessitate placing the non-operating purification and dehorating filter, makeup and purification uej a. demineralizer and makeup filter in service. These actions are required due to the limited capacity of these ecmponenets. I In addition, block orifice by-pass valve (MU-VS) is adjusted to regulate by-pass flow whenever letdown flow to the block orifice (MU-1-F E) is greater than fourty-five (45) GPM. In the unlikely event seal water to one or all reactor coolant pumps is lost, operation of the pump may be continued without any special operation of the makeup and purificatio t system. Seal water return valves are interlocked to close automatically l on a low seal water flow or loss of seal water flow. Operation in this mode is possible due to the inherent design of the reactor coolant pump seals. - l \\ e (_ t J L )' ' ' ' g / 6 q "6 6 g .h .hs =

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,,, - -. _ ~. - s y. } 3.5 Emergencv Ooerati.on The makeup pumps la the system serve a safety features function by providing torated water from the borated water storage tank to the reactor coolant system immediately following the LOCA. The high discharge pressure capability of the pumps permits makeup water to be added while the reactor pressure is high and before the pressure has decayed sufficiently for emergency low pressure injection using the decay heat removal pumps. ~ Following a loss-of-coolant accident, the safety featu_es equipment will be automatically actuated by a signal frcm the _ safety features actuation system (SFAS). The building isolation valves, MU-V2A/MU-V23, MU-V3, MU-V18, MU-V20, MU-V25 and MU-V26 close, halting all normal system ficw out of and into the reactor building. The high pressure injection valves, MU-V16A/B/C and D~ in the makeup lines to the fuur reactor coolant pump discharge lines open, as do the suction valves e DH-VSA/B, in the lines from the borated water storage tank l to the makeup pumps' suction header. A signal from the SFAS w ill s t ar t pump s MU-P-1A a.-d IC. If either MU-P-1A or 1C is out-of-service, MU-P-1B must be valved to the same section of the common suction and discharge headers as the out-of-service pump. (Normal operation under this condition, therefore, provides no back-up capability.) The two makeup pumps operate in parallel to inject the borated water into the EitherhumpMU-P-1AorMU-P-1Bdischarges I reactor. into a 4 inch line (the normal flow path having been stopped by the building isolation, valve) which branches into two 2 inch lines leading to' the discharge piping of reactor coola at ,i i pumps RC-P-1B and RC-P-2B. Either pump MU-P-1B or MU-P-lC . discharges into another 4 inch line which branches into two 2 inch lines to reactor coolant pumps RC-P-1A and RC-P-2A. f ~

.x. A r

• m

) A ficw meter in each emergency injection branch line, indicates flow and alarms on a high flow of 260 gpm and a low flow of 75 gpm. The MU-V16 series of valves (A/B.C & D) are electric motor operated stop valves in the emergency injec t ion branch line to each reactor coolant' pump and provide isolation upstream of reactor building penetration for each line. A high flow alarm from the branch line flowmeters could indicate a piping failure downstream of the flow orifice and, there fore, the flow indication from both injection lines to each loop must be compared. A low flow alarm would be indicative of a makeup _ injection valve failing to open and an attempt should be made ~ to open the valve remotely. the reactor coolant pressure decreases, the discharge flow As from the makeup pumps will increase. When the reactor pressure M3j has decreased to approximately 200 psig, the decay heat removal pumps will provide the makeup injection and operation of the high pressure injection pumps in the makeup and purification system are terminated manually. (When it becomes necessary to change the condition imposed by the cafety features actuation system on a system component, the actuation signal must first be bypa sed and reset.) A second safety features function served by the makeup pumps is recirculation,of the coolant from the reactor building l / emergency sump after an accident. In the event of a small reactor coolant system leak where the reactor pressure decreases slowl, the supply of borated water in the borated water storage tank may be exhausted before the reactor pressure has { fallen to 200 psig when recirculation, using the decay heat removal { . rl e O -__ _.. ~ __m.. m. ..--.m._.

~ -~

.ame

,= .,,,g. ~~ j ~ I system, is initiated. In this case, the makeup pumps are utilized for recirculation. When the level in the borated ' water storage tank approaches the low-lcw setpoint," valves DH-V6A and DH-V6B in the suction lines from the reactor building sump are opened to provide suction for the decay heat 'moval pumps. In addition, valves DH-V7A and DH-V7B in the. .s connecting the outlet of the decay heat removal coolers to the suction header of the makeup pumps are opened. The decay heat removal pumps then discharge the coolant from the reactor building sump, through the decay heat removal coolers and into the suction header of the makeup pumps, providing the required NPSH for operation. The makeup pumps discharge the cooled water via the emergency injection lines into the reactor coolant system. This method of recirculation is continued until such time as the reactmr pressure decreases

qd aa sufficiently to permit recirculation using only the decay heat removal pumps.

The makeup pumps and other system equipment having safety features functions are powered electrically from the emergency diesel generator buses to ensure availability in the event of a station power failure. 4.O HAZARDS AND PRECAUTIONS

• There are no explicit hazards associated with the system.

The normal precautions must be taken with a system in which a radioactive liquid is transported. Additional precuations must be observed due to the explosive nature of hydrogen gas which is introduced into this sytem for oxygen scavenging in the reactor coolant. All equipment vents and drains are directed to their respective radwaste disposal systems. The system must be maintained in good repair in order to serve its normal functions and is continually monitored during normal system operation to indicate performance. a, / : ~

A ~ f i The system must be operated in accordance with the standard procedure prepared for thie system. This procedure has been - developed from the recommendations of the reactor and equipment manufacturers and incorporates all safety precautions from both a radiological and engineering standpoint. t - e e N i + l i i / / i ,,r l c,J 6 9 W * * *m 6 9 M*'O,W* 'Wa* V v'n s m ~ ~

N _ ~~~3 _h ~, ~ _ _ ,~_y TABLE 1 E"'DOWN COOLER Identification MU-C-1A, MU-C-1B Number Required Two M anufa cturer Graham Mfg. Company Cleanliness Factor 0.85 BTU hr. 16.1 x 10 / Heat Transfer, Tube Side: Fluid flow, lbs/hr. - Source

3. 5 x 10

- Reactor Coolan: Design Press., psig 2500 Design Temp., F 600 Material 304 SS Pressure drop, psi 3.0 2g m i Shell Side: Fluid flow, lbs/hr. - Source 2.0 x 10 ICCWS Lesign Press., psig 200 Design Temp., F 350 Material CS PresstIEe drop, psi 15.0 Clas sif ica tio ns : ! l ASME Code Class. Tube /Shell III-C lethal /VIII Nuclear N-1 Quclity Control 1 k. Seismic I Cleanliness, tube /shell B/C ( 3 I ~ - 4

-^ i T_ABLE 2 SEAL RETURN COOLER Identification MU-C-2A, MU-C-2B Number Required Two Vendor Babcock & Wilcox Co. Manufacturer Whitlock Mfg. Co. Cleanliness Factor 0.85 Heat Transfer, BTU /hr. 1.38 x 10 ~ Tube Side: - Fluid flow, lbs/hr. - Source 9.2 x 10 - Reactor Coolant Design Press., psig 150 Design Temp., F 200 Material 304 SS - --e 4 Pressare drop, psi 10 i 4 Shell Side: Fluid flow, lbs/hr. - Source 9.2 x 10 - NSCTdS Design Press., psig 150 Des ign Temp., F 250 Material CS Pressure drop, psi 15 Classifications: j ASME Code Class. Tube /Shell III-C lethal /VIII Nuclear N-1 / Quality Control .3 Seismic I Cleanliness, tube /shell B/C e' e . 'J '~ -4

.... A .~ .s .e I TABLE 3 _ SEAL INJECTION AND SEAL RETURN FILTERS SEAL INJECTION FILTERS Identification MU-F-4A, MU-F-4B Number Required Two Vendor B&W Manufacturer Pall Trinity Type Disposable Cartridge (23 micron absolute) Rated Capacity, gpm 50 - Design Temperature, F 200 Design Pressure, psig 3050 Materials of Construction SS Code ASME, Section III, Class 2, 1.9-5 a Classifications: l Nuclear N-2 Quality Control 2 Seismic I Cleanliness B ~ / -50A-7,3 ^

_- ~ = - -.-.. ..A TABLE 3

con t 8'd)

SEAL INJECTION AND SEAL RETURN FILTERS 9EAL RETURN FILTER Identification ?RJ-F-5 NumbeY Required One Vendor B&W' Manufacturer Pall Trinity Type Disposal,le Cartridge (20 micrcn absolute) Rated Capacity, gpm 20 o -Design Temperature, F 200 Design Pressure, psig 150 Material of Construction SS Code .ASME, Section II.'., Class 3, 1971 -nj -m Classifications: Nuclear N-3 Quality Control 3 Seismic I Cleanliness B l t 'i -50B-I ~

- - 5. e TABLE 4 MAKE-UP AND PURIFICATION LEMINERALIZER FILTERS AND MAKE-UP FILTERS - Identificatim MU --F - 5 A, 5B (Make-up and Puri.fication Demineralizcr Filters) ~MU-F-2A, 2B (Make-up Filters) Number Required Four Vendor Babcock & Wilcox Co. Manufacturer Pall Trinity Type Disposable Cartridge (1 micron at 98% retention) Rated Capacity, gpm 80 ~ Design Temperature, F -20 to 250 Design Pressure, psig 300 Materials of Construction SS Code ASME Section III, Class C, Lethal Jjj Classifications: Nuclear N3 Que.Lty Control 3 Seismic I Cleanliness B l e (,., j. /. t 4

AL ..-~- TABLE 5 MAKEUP AND PURIFICATION DEMINERALIZERS Ident ific at ion MU-K-1A and 1B Number Regt' ired Two Vendor Babcock & Wilcox Co. Manufacturer Illinois Water Treatment Co. Des ign Temperature, F 200 Design Pressure, psig 150 Rated Capacity, gpm 70 Resin Volume, ft. 50 Type Mixed Bed Ratio (cation / anion) 2:1 Material of Construction SS x2i ~ Code ASME Section III, C_ ass C, Lethal Cla s s if ica t ion s : Nuclear N3 Quality Control 3 Seismic I Clean 1iness B e ,,h - ) .---4 ..~.-..,,,.-.q.., ,w

.._. 2 _ _. _ = = 5 ?- a i TABLE 6 MAKEUP TANK Identification MU-T-1 Number Required One Ve'ndor Babcock & Wilcox Co. Manufacturer Buffalo Tank Division ~ Site 8' 03 x 13' High Design Temperature, F 200 Design Pressure, psig 100 Capacity, gals. 4,500 Material of Construction SS Tank Thickness .347" -A Code ASME Section III, Class C "13 Lethal Cla s s if icat ion s : Nuclear N3 Quality Control 3 Seismic I Cleanliness B l . j !; ! i . ge w-er.-e e .--.+.e..

TAFLE 7 ~~ ~~ _.t MAKEUP PUM.P j Pumo Details Identification MU-P 1.A, MU-P-1B, MU-P-lC Number Installed Three Vendor Babcock & Wilcox Co. Manufacturer Bingham Pump Co. >Ddel No. 3x4x7 MSD Type 9 Stage, Hor izont al, Single Suction, Centrifugal Rated Capacity, gpm 100 Rated TDH, ft. 5545 (min) NPSH, ft. 28 Speed, rpm 6800 (Horizontal speed increaser) Design Pressure, psig 3000 Design Temperature, F, 200 Ej Lubricant / Bear ings Forced Oil Gear Increaser Forced Oil Coolant NSCCW System Motor Details Manufacturer Westinghouse Type Enclosure Drip proof Rated Horsepower,,hp 700 Speed, rpm 1760 Power

4000v, 89 amps (full load) 60hz,30 Source (for each pump-motor)P-1A 4160V Engineered Safety Features l

Bus 2-lE P-1B 4160V Engineered Safety Features Bus 2-lE/2-2E P-lC 4160V Engineered Safety Features Bus 2-2E Lubricant / Coolant Sealed Bearings /NSCCW System i f' I . _ ~ 4=

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1. Nnction location gg Input Ra nge Output Range Se t poi r.t.

MU-f liS-308 3 Mand Switch Cperates MU-V135, Make-Up Tank Liquid Panel 329 Selector N/A N/A - N/A g Sample Switch o O NU-rH5-3092 Mand Switch Operates MU-V1668, Seal Water return Cooler Panel 3 Selector N/A, N/A N/A i MU-C-2d inlet Block ) Switch HU. r HS-3 09 3 HanJ bwitch Operates MU-V1678, Seat Water return Cuoler Panel 3 Selector N/A N/A N/A e MU-C-28 Outlet Block Switch l MU-FNS-3094 Hand Switch Og, orates MU-V1664, Sean Water retuzn Cooler Panel 3 Selector N/A N/A N/A MU-C-2A Inlet B lock Sw i tc h r MU-fiLS-3095 Hand Switch Operates MU-V167A, Seal Water return Cooler Panel 3 .,:cotor N/A N/A N/A 8 MU-C-2A Outlet Block Lo t tc h I f Mu-rus-3427 hand Switch q>erate s MU-V26 RCP seal water return l Panet 15 Pushbutton N/A N/A N/A 3 Isolation (Aunillary Building) i MU-FHS-3428 Hand Switch

4. crates MU-V16A, Make-Up guppe to

' Pane l l'$ P 6hbutton N/A N/A N/A Primary temp r MU-ris-3429 Nand Switch Operates NU-V16B, Make-Up pumps to Panel 15 Pushbutton N/A N/A N/A Primary 14)op l MD-rHS-3430 Mand Switch Operates MU-V16C, Make-Up Pumps to Panel 15 Pushbutton N/A N/A u/A Primesy loop g MU-ThS-3431 Hand Switch Operates MU-V160, Make-Up Pumpe to , Panel 15 Pushbutton N/A N/A N/A Pria ary Ix>op MU-lhS-3441 Hand Switch (perates MJ-V294, Demir.oralized Water Panel 8 Pushbutton N/A N/A* N/A d to Meke-Up stre.sra I y Mu-FIG-3 4 4 2 Hand Switch Ope r a t e s MU-V M, Mak e-Up Pumpe t o s e a l Panel 3 helector retua n cooles s Switch N/A N/A N/A MU-FHS-3443 Hand Switch Og e r a t e s MU-V 31. Mak e-Up Pumps to seal Panel 3 Selector return coolers Switch N/A N/A N/A MU-rHS-3444 Hand Switch Operates MU-V104, Purif.ca tion and Panel 329 Selector N/A N/A N/A g. Ocborating filter Outlet Sample

• Switch I

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j g, L. .- t e s 4 / BURNS AND ROE,INC. o. =,. 4 = v. L.. .. cwe. W O No Date Bouk No Pave No. D e**<g No Coac. No Sh.es of 8, Cta k ed App.e d Tme 1 I,.,., q---- . e g.l 6 ~~7%B!E 8 (continied) { ! I i i.. .{. e' ,.,. l 'l ' t '] I l e t i I I a f j i l 4 8 s W IN 1RUllFNTRTION AND COtrTROL '~ ( I l l l -I g tput parqa l j 8 ,, f,,, g a 1-t- - T idertification .irscription i I"unc t io n { l 4 location ge ^^ Irpot Pange l Se t uf fit 3 i - i 1 l, f N/A i .i g.. ,[ PtM 10-MIS Manual Indicator Operates maks ap feeJ atop valve, (MU-V10) J . 8 Panel 3 Maintained s N/ak 1/1 Y-l l Switch Selector i l g I e. PtJ-v11A 4 118 Manual Indicator Operates make-up filters inlet stop valves, (t10-V31A/ l Pane t 3, Maintained i N/A j N/4 N/A -~~ t . (' MIS Switch . MU-V118) l l Selector i { I t g 3 e l' ~ iMU V12) Panel 3' k/A N/.4. - - - mea - tt>-V 12 -MI 5 Manual Indicator. Operates make-up tank outlet stopsalve, Maintained e Switch Stieotor I s, i I l' g MU-v13-MIS Manual indicator O' trates make-up tank vent valve (MU-V13) l Pan &1 3-1- ' Maintained l e' 'N/A N/ 4 ' ' ] ~ ' N/\\ Switch ' Selector a 8 [ i i PtJ-v 1 f.A. 165,.* Manual Indicator Operates emergency high pressure make-up injectior. Leolation Panel 3 -[, Maintained N/A N/ g ; 1 m-N/A i 16c,160 - MIS twitch valves, l et>-V16A/MU168/MU-V 16C/MU-V 160) .l .} selector g p_. . _... p_ ; (- l 1 % MN ; ter Converter 10-50 made -1 3 - 2 7 p s i g ' ~ '-- N/ t ' ^" ' ' ' HU-25-E/P Converter converte electrical signal from posittor. r (Mu-25-Poc) to t. - -' g.neumatic eignal for opra ting R.C. systou sinn e-u; flow I - 8 contaol valve, (MU-V17) l ! l _I ,'}'g l 3 ; MU-V20-MIS Manual Indicator Opeastes total seat flow leolation valve, (MU-V20) _ Panel 3 Naintained N/A N/.4. E/A j-r- l l . { ! Selector Swi tch l 6

i

~-t MU-V25-M23 i~*"_.., ~ Manual Indicator Operates total eeal return internal laolation valve, i Panel 3i Naintained ' 4/A . h/A. _ _. M/A - _ '... S=Ltch ( MU-V2 5) l Selector a j l I f. j - I-- j -- 4 i ' -- l-- MU-V26-MIS Manual Indicator Operates total seal return outernal leolation valve, ' Pane l 3, Maintianed., N/A N/A N/\\ ~" ' Switch (MU-V26) e i l Selector i j 4 8 i j t 1 i ; MU-V27-MS Manuel Ewitet. Operates sake-up tank nitrogen addition block valse,, ) l Panel 3 l Naintained N/A i i i N/A N/g (MU-v2 i) l g-f, - h l l Selector l .i a 1 MU-V28-MS Manual Switch Operates make-up tank bydrogen addition block valve,

• l jPanell' Maintained l

N/A l. N/A 3r/T' d"...- j (MU-v26) t' l Selector l 4 I i t -i t j l MU-32-E/F Converter Conver t s electa tcal eigt.a1 from positioner (MU POC) glocal., l j t/P Converter 30-50 made 3417 psig N/A -- - - r to pneuestic e39nal for operatiny R.C. pump seal flow 6 cuntrol valve, (MU-v32) l

• ~ i

l. !

l. ? l ! 1L_.. I MU-vi3A, 3)s, kanual switch Operates individual seal return leolation velve.e.

• N ? 33C, 6 3 3D-M18 (MU-V3 3A/MU-V13 B, MU-V33C/ & HU-V33C)

{ i . Panel 4 ;. l. Maintained j N/A , N/le j N/lk j g l 1 - I selector i a a s, } n' " ' " j' l l l - $ - ; :. t,~ -- .C .. j-m fa - I'. N]-l L ;b'N, rt ,h d Il i ' j ! I 3I ' _.~;4- }. b L.. _ } N, I I I-I ~ l p ,. y-l.,j I ,,o., ? k N k l j.

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i i i t i i i n n r n n n n n n n n n n n o r r t N N o o o o a o u u o o o o m N tc, o r F M M M r M M M r M M n r n n e a o o t te e e e e e e e e te e e e e-t t t t t t t t t t t. t. M M s s s s s s s s s s s s s e y y y y y y y y y y y y y y m n n S S s S s s S S S S b s S s 3 a o o k i t t t. t t t t t t t t t t t t t t t n r a a a a a a a a a a a a a n a n n n n n n n n n n n a e a e l i J o o u o o o l l l l l l l l l e t l l l l l l n J o o o o o u o o o a ta a o o o o o o o o o o o o o o o P I P C C C C C C C C C C C C C C C i i e i g g g g na l i i l i 9 s e a P m m p p p p o g i e c c le ig g g e I ' b 6 6 p p p 0 0 0 p p p. 4 g !l f i i 0 0 0 i l t r l s a 0 0 0 s e e a 0 0 3 3 3 5 i 1 1 0 0 3 0 5 0 7 r 3 3 3 0* 0 0 3 7 3 A A 1 A A m. a 0 0 0 0 0 - / / - / / v 1 1 2 2 2 5 5 5 0 0 O N N O N N l. ll g. I; l. r' i' i. I 6 e l c l,. l 1 6 8 r 0 1 2 5 3 0 0 3 4 5 6 6 6 4 0 0 m 2 2 3 3 3 7 7 7 3 3 4 Sif Z 7 7 7 7 7 1 1 1 P T S S t E E S S S S S S P P P 2 i ! g l .i ' u R R P P P P P P D L D 1 p 7 n U u u U U U U U U U U 0 4 U - g . 3 . e } T_ M M M M M M M M M M M 3 7 M N ,.f il-l f. . ' w-." S ,!t T i e i! - 1 ,

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l U P i. I* I 5 5 5 0 0 0 e ~ m//2 2 2 2 2 / / / / / / / / A A 2 0 0 0 A A A A A A A A R t oi .l Tt in M N 1 1 1 2 2 2 N N N N N N N N U o O" r l q ,i f .w P p 1d e g I ft C s l ,I a D m r r l i I i l i. i 1 H r e e 6 9-A a t t A A A A A A A A A A A a m..'.I ,~ mnl a s / / / / / / 5 0 5 / / / / / S 3 N h N N N k 2 7 2 N N N W W E R I O P T e I i ,i i l~ .t-j A A T I 3 C r e i l j, .1 e N U u N s N l; !l. ,{, s e ,.i i fo . A T l i ig g e a ig r g,j j 4i .m e g g D .I' i i p g 1 E g s l i p p p l e O w, w, w t i 1 1 1 jl: ,(. ,. b.\\ U p p p , i g j. N a s e a p .l, ig; ,pl e - Ns P j, r r r s s s i, u r -j i* i,,; ii iI' l byhm. e e Am P w, L L L e p r e. o o o n e e s s s P 5 , L e a o s u E l K L e e e e s l g.' .,; i .l lIl N r r r f e, s A e e e u u u f r e 6 s s s r r r h e l i ,p ,,,i, g u u u s s s D s P s s s e e e a p e e e P P P g r a i i r L L r r r i E i I t r M M P P P r r r H t t p eIl* / / e e e l n i, c c r r r d d d s a e p e. 4 1 u u e e e a a a r i r m e t.,i l ; -l l d d d d e ta e e t e u r kga e c v 6 n n a a n h i H t n f P u f o o o e le ie 1 e f e ~, i r i it l t e e e 1 r i e rp H p t g g g P e D e b p a s n n n r r r f t u d A 1 o o o a a a g f h a L u a i 3 i i i h h h n i d a a t t t c c c i D ig n t e . 6 e i q m e R p c c c s is s t H m r g s t u u u i D D r g e e t i i a h r n n n S S S D i w w o i r d T a r r n r U o o A ts C A 3 d d 1 I I 1 1 1C b H e a e a. a e t o o B e t t =

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1 l t e C e e uP P P P P P e 1 p r u n l L a m s M M M M M M a i n T o d M A A I ffg d t F i e A i o. b U U U U U U n l r v a s a o n i p p e p p p i SA a. o t e u F o e r t t p p p p t s i r c u u u u p n N e e s s e w e e t r r t s m ~ = s v y y u u e S s P P P P P P t u e P P d P e C d a t j n = S e y y p 'p p p p p c e n p p a p P p t d k r r r U t U u U U i k I U u U u U e O a a a f d B M M M 5 @ { o d T s m m e e e e e e i g t l e e e e e e A s i i k k k k k k ri a a k k e. t. I M P P M M M M H M P p s s M M le k a a e r r a a a a a a u s e e a a a L e C. 0 T N N n D o E i 1 2 1 6 T t 0 1 2 5 3 N a 0 3 3 4 5 6 6 6 4 s 0 l c 2 2 3 3 3 7 7 7 3 3 4 A O i 1 7 7 7 7 1 1 1 i I f ? i H i L L L L L L N is H F A e P 2 I a A L t A N A A A A A D D 1 T n R R P P P P t D" '"n c o C e N d U U U U U W U U U u U U eg P I M M M M M M M M M M M h a / h i Oe lte

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.i, -i j IU o eu D r. N n S i *e a t S i' I i l hs o R m ,i' g C( T l i t) r -, 3 / 5 2 6 0 5 6 6 / / ;, al l. 5 A 4 0 0 A A a A C I N 2 4 1 e 9 2 2 1 N H 9 I A H 1 E N l l le. P 5 . 4; g l e i i i { l &.. L l i 3 N $l l- ].' .t 6l l! l A N 3 T A 1 l. e' 9 D ET I ro N l j1' .l, l l' 8, l U a 2 )s i[ i ~ p8 l .i .fl l t t n L .l, e 9l' l e: p ,[ o d r N, i A e f .l ti g ..l aii lj e r e P f y a D p a. e g g = g p i i g l s g 6f1 a h g i i p g s i l l ,l g e e i o t p e, e e = r H L w e r 1 lt r g / u e u 9 w, w lI li l. l a 1 i f w s o o o s L L li l o, r H r , / r o a e e L e w f t s w h i o g o h P L r r ,l i;. .f [ w l i i L g / n u us'. e d r p a r H / i l h g s s i l j a o, . i. t i r h H i ig g a e. i o n e t H 'K r r e p e p e n i o i ig e e t H r n h p .i r o m L L u e w g P j, i I o A u i e l s r o i l l N t t D n n e s e i' H iO o. i m a c o r v e f r iu r e n i u e r f w t g e o t t L P i e o e e p j i c e 6 D l b t. i n m I t e ri 6 F u u u e a j 1) 1 h L L h e f e ig A p T l c n t h a i I a T T U r n H p a i g S i l s U. U o e e a i t M H s s k C b i r a ( ( r a H p u g t p u a e e M s e o P i o o t t n p p e r w o s t o r A d h a o t tm, p t r t o r m m v i s a a i i e u u 4 r p a p p T T r t s P e 1-e m m c i e C w P uu P P U U U j r p p pr u u p p p e d re n u U U ke u o - s n s e a e I s e e s d es k m k e k k e h e ts t 4 k e a a C C. C e as a a a P s a a C M u L R MP p D h M M H M M ie D p n I r 2 n o 2 e 2 i t 3 2 o a e 1 t i 2 H t, 1 1 c n H L H H A tJ H s M a c i A i u t U A L A A A P A A A P a f n A A P A r L P D r r P n T r D r - 4 i A 9 1 4 1 1 1 2 2 5 5 ~ t 0 4 7 6 3 4 4 9 8 n 5 7 8 a n e W - 6 - e e S. I 3 M M6 M M M3. U U U u U U U d U U4 U U U h M M M M3 M M6 M' .u u_. 1 h n e Ue ii. e r WDOT a fi !j

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O* seq Ne Co s Ne $hi s t I of I y a av CP shee A pen u.ed 9-. 1.s.e e i w e TAbtr 9 IContinued) l 'f I P ANrL PuMINTID ANNUNC I ATIGS AND CIMPUTrR INPUTS '~* Identification P'easated Variable, Unite Alerts Setpoint Input Source Variable Pange Panel Name and No. Cwputer Inputa k " Seal peturn Coolese inlet Temperature, r

• N/A N/A MU-TE-723 0-200 r Seal keturn Coolere MU-C2A Outlet Temperature, r N/A N/A MU-TE-724 1

0-200 r 1. l I f l Scal Feturn rouler Mu-C-23 Outlet Temperature; F l ! { I N/A N/A MU-TE-736 0-200 r I l Le town Cooler MU-C-1 A (Ntlet Temperature, r later N/A PF ' -TE-73 % 0-300 r i Le tdan Couler NU-C-lu Outlet Twperature, r' f later N/A MU-TE-740 l O-300 F e Letda n Coolers Inlet Temperature, r N/A N/A MU-TE-741 4 l [' i 0-300 r ' ~ 8 6 Make-tp Puerp suction Header Pressure, paig l N/A i 12.5 . MU-PT-732 0-30 psig i I e l ,l Letd

• n Pressure

,a 1 6 N/A l N/A MU-PT-1579 O-50 peig l g i Seal fieturn Coolere Outlet Tesrperature N/A N/A MJ-TT-1580 20-220*r. 7...u. i t I m I ' I N/A ! N/A ' MU-TT-1581[ 70-220 F l, Maketup Tarik Temperature ,i, i i , i i asw Coirputer inputa j Le tocann Tempe ra tus e, F lMU-5-TE 0-200*r g 135 N/A Letown Pressum e, psig 145 N/A MU-6-PS 25-375 psig Mak e-t'p Tank Tempe

use, r

135 N/A MU-16-TE 0-220 r Make-Up Pump thrs and paJial tiearing temperature, r 170 N/A MU-50-T[1 100-200 r l' Make-Up Ptsup Dad Learing temperature, r 170 N/A i MU-50-TE2 100-200 F I Make-Up hs,p Gear

Dearing Temperature - Pump End,

r 165 N/A MU-51-TEL 100-200 F. Make-tp Pump Gear bearing Terporature - Pump Center, F 165 N/A MU-51-TE2 100-200 r Make-Up Pump Gear nearing Temperatur e - Motor Center, r 165

• N/A MU-51-TE3 100-200 r

~ ' ~ Nake-Up ' ump Gear Aearing Twper ature - Motor End, r 165 N/A MU-51-TE4 100-200 r Make-Up Piunp Motor Baaring Temperature - Bear E x2, r 100 N/A 4 e MU-52-TE1 100-200 r - - - i 3~ Make-Up pa p Motor

Dearing Temperature - Outboard,

r 100 N/A MU-52-TE2 100-200 F Mak.-Up Mucor stator Tere.rature, c: i !i i .. _, _i 125 N/A i MU-5 3-TE6 40-135 C l 4

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