ML19339B636

TMI-2 Recovery Program Preliminary Sys Description Task TS-27,mini Decay Heat Removal Sys,Revision 4.Prepared for Util

ML19339B636
Person / Time
Site:	Crane
Issue date:	10/07/1980
From:	BURNS & ROE CO.
To:
Shared Package
ML19339B635	List: ML19339B634 ML19339B636
References
TS-27, NUDOCS 8011070358
Download: ML19339B636 (63)

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O BURNS AND ROE, INC.

1 TIL E MILE ISLAND NUCLEAR STATION UNIT 2 RECOVERY PROGR.U(

l PRELIMINARY SYSTEM DESCRIPTION TASK TS-27 MINI DECAY HEAT REMOVAL SYSTEM (B&R DWG. M041, REV. 6)

(B&R DWG. M043, REV. 9) i

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(B&R DWG. M044, REV. 1) t l

'(B&R DWG. M045, RE7. 1)

(B&R DWG M227, REV. 0) l4

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PT&O DOCUMENT APPROVAL RECORD Mini Decay Heat Removal System Description TS-27, P P.. 4 Titie Documen c Number 1.

Written By:

R.

Brownewell 10/7/80 PTGO Engineer 2.

Preliminary Approval:

R.

Brownewell 10/7/80 PT&O Grcvip Supervisor 3.

Transmitted for Technical Review 4.

Technically Approved By:

(Name)

( Si.gna ture )

(Date)

Mech.

A.

Asarpota S

7 8U Nuclear R.

Seibert

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HVAC M. Muray kJ fr A. /r.n y n'fA2 (.30 f

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Elect.

R.

Gagliardo

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7 S. Chou Civil g

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5.

Final Approval PT&O h' y n e4 s,-d 1 [4-

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REVISION RECORD PRELIMINARY SYSTEM DESCRIPTION TASK 'IS-27 MINI DECAY HF.AT RD0 VAL SYSHM Project Manager Project Manager Rev.

Date App rov _al Rev.

Date Approval 0

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LIST OF EFFECTIVE PAGES PRELIMINARY SYSTEM DESCRIPTION MINI DECAY HEAT REMOVAL SYSTEM TASK TS-27 Sheet 1 of 2 Page Revision Numoer Number 0

1 2

3 4

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7 8

9 10

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ll 12 13 14 15 16 g

17 18 19 20 i

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28 29 30 31 32 33 34 35 36 37 38 39 40 41 k

42 43 11 l

s LIST OF EFFECTIVE PAGES 1

PRELIMINARY SYSTEM DESCRIPTION MINI DECAY HEAT REMOVAL SYSTEM TASK TS-27 Sheet 2 of 2 Revision Number Page Number 0!

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cc 51 52 53

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TABLE OF CONTENTS FOR MINI DECAY HEAT REMOVAL SYSTEM SECTION PAGE

1.0 INTRODUCTION

1 1.1 System Functions 1

1. 2 Summary Description of the System 1

1.3 System Design Requirements 5

2.0 DETAILED DESCRIPTION OF SYSTEM 7

2.1 Components 7

2. 2 Instruments, Controls, Alarms, and Protective 17 Devices 3.0 PRINCIPAL MODES OF OPERATION 21 3.1 Startup

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21 3.2 Normal Operation 23 3.3 Shutdown 25 l

3.4 Special or Infrequent Operation 26 3.5 Emergency 30 I 2_

4.0 HAZARDS AND PRECAUTIONS 31 s:

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APPENDIX TITLE TABLE NO.

PAGE Mini Decay Heat Removal Pumps 1

33 M.D.H.R. Heat Exchangers 2

35 M.D.H.R. Debris Filter 3

37 MDHR Air Filtration Fans 4

38 MDHR Exhaust H.E.P.A. and Prefilter Assembly 5

39 Instrumentation, Control & Alat os 6

40 4-TM1-2 Expected Decay Heat Load vs. Time, 1980 Figure No. 1 55 Typical MDHR Pump Characteriestic Curve Figure No. 2 56 (MDH-P-1A, MDH-P-1B) 4 P*W 9

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1.0 INTRODUCTION

1.1 System Fenetions The functions of the Mini Decay Heat Removal System (MDHR) are as follows:

a.

femove heat from the reactor coolant system by forced circulation through the core.

b.

Provide a method of removing heat from the reactor coolant system during reactor vessel head removal and vessel defueling.

Provide piping connections for future cleanup of the reactor coolant c.

system.

d.

Provide a means of sampling the reactor coolant system ut ilizing the Mini Decay Heat Removal System.

e.

Provide a means of controlling ambient temperature and airborne radiation levels in the pump and heat exchanger enclosures.

The Mini Decay Heat Removal System has an interface with the following systems:

a.

Alterr. ate Decay Heat Removal System, ADH, (Westinghouse DWG.

WIM1-1019-2).

b.

Temporary Nuclear Sampling System, SNS, (Burns & Roe DWG. M044 & M045),

" Temporary" Nuclear Services Closed Cooling Water System, TNSCCW, c.

(Burns & Roe DWG. M041).

4 d.

Decay Heat Removal System, DH, (Burns & Roe DWG. 2026).

421:

Heating and Ventilation Fuel Handling Building (Burns & Roe Dwg. 2343).

e.

I f.

H&V Mini Decay Heat Removal System Fuel Handling Building (Burns &

Roe Dwg. M227).

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1.2 Summary Description of the System (Refer to Burns & Roe DWGS. M043 Rev. 9, M041 Rev. 6 and M227 Rev. 0) l When it is desirable t swit$h from the natural circulation mode of the Reactor Coolant System to forced circulation for decay heat removal, the

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Mini Decay Heat Removal System will be put into service until the reactor has been completely defueled. The Mini Decay Heat Removal System takes suction from the "B" loop reactor outlet (hotleg) via a connection to the Alternate Decay Heat Removal System (ADH) which connects to the original plant Decay Heat System (DB). After passing through one of the j

MDRR system's parallel heat exchangers and one of the MDNR pumps, the coolant is returned to the reactor through the "B" Core Flooding injection nozzle via a connection to the ADH and DH systems.

Within the Mini Decay Heat Removal System, the reactor coolant first passes through a filter to remove possible debris in the Decay Heat Drop Leg.

The filter may then be bypassed and can be removed in its lead g'

i shielded portable cask or replaced by a back-up filter.

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The flow proceeds to the selected heat exchanger (MDH-RX-1A or MDH-HX-1B) where the heat is f'ransferred to the shell side cooled by the " Temporary" Nuclear Services Closed Cooling System (TNS).

(The TNS System is supplied by the existing plant Nuclear Service Closed Cooling System via a tie into the "A" Spent Fuel Cooler supply and re turn lines.)

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The discharge from the MDER beat exchangers combines into a common line and is routed to the selected Mini Decay Heat Removal Pump suction i

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(MDH-P-1 A or MDH-P-1B). The suction line contains the Temporary Nuclear l

Sampling System return sample connection. The MDH pumps discharge thru individual check valves and discharge isolation valves before combining into a common header containing a manually operated throttle valve to regulate flow to the reactor coolant system. This discharge header is provided with a full flow recirculation line and throttling valve running back to the heat exchanger suction to facilitate system testing, I

startup, and meet the minimum flow requirements during system operation. -.

Double valved tie-in connections are installed upstream and downstream of the system's outlet isolation valve (MDH-V15) to provide the capability 4-to connect to a future system for RC water clean-up.

Prior to the coolant.being returned to the ADH/DH system the flow rate can be measured and an RC water sample can be taken by the Temporary Nuclear Sampling System. Remotely operated valves are provided for flushing, venting and draining of the system to reduce area radiation levels for equipment maintenance.

Since two parallel pumps and heat exchangers have been installed in the system for redundancy, either pump can be operated with either heat exchanger. However, pump MDH-P-1B is to be preferentially used as the primary MDHR pump because of its superior access for maintainability. A

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" cross connect" line located downstream of the "A" heat exchanger but 2

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upstream of the "B-heat exchanger allows a series flow arrangement if

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additional heat removal capacity be required.

Redundant motor operated isolation valves are installed at the Mini Decay Heat Removal System tie-in points to the Alternate Decay Heat Removal System piping. These remote operated isolation valves function to separate the MDHR system from the safety grade Decay Heat Removal System "I

and establish the interface with the RC system pressure boundary. The first MDHR system outlet isolation valve is provided with jog control capability and will be the normal method of flow control.

Radiation shielding of the MDHR system piping, pumps and heat exchangers has been provided by either utilizing existing shield walls or the construction of additional walls to minimize the exposure to operating 9

personnel. The MDHR heat exchangers are located in the southern most portion of the 280'-6" elevation of the Fuel Handling building and are separated from the MDHR pumps on the north side by an existing 2' thick l

shield wall. A curb -is provided around the perimeter of the MDHR heat etchangers to :ontain any flange leakage and direct it to a floor drain.

The MDHR pumps are shielded on their north side and between the A & B pumps by 2' thick 7'-4" high seismically constructed concrete block walls. The pump cubicle is surrounded by 16" thick, 7'-4" high seismic block walls on the east and west sides. An entrance doorway exists on the east wall of the pump enclosure and a sheetmetal roof completes the cubicle to form a controlled HVAC environment. The supply and return sample lines from the MDHR pump's discharge and suction connection points to the Temporary Nuclear Sampling System on the 305'-0" elevation of the 1

Fuel Handling Bldg. have continuous shielding installed. This shielding is either in the form of 2" lead brick,1" lead sheet or 8" solid concrete block to prevent an excessive increase in area radiation levels during 4,

the sampling evolution.

Additionally these supply and return sample lines have demineralized water flush connections at the SNS system sample sink to backflush both lines to the MDHR system connection points if the area radiation levels should become excessive as a result of repeated sampling. For a detailed

- -[y description and operating requirements of this sampling evolution refer to the S.D. & O.P. for Task WG-19, Temporary Nuclear Sampling System.

As mentioned above the MDER pumps are enclosed in a shielded and environ-mentally controlled cubicle to prevent the spread of airborne contamina-tion should a leak develop at ~ the pump's seals or piping flanges. The cubicles are ventilated by redundant HEPA fan /fiitration units with a l

4 capacity of 2200 cfm each and are located on the 280'-6" elevation of the F.H. Building between the Decay Heat Service Coolers. The fan (s) (MDH-E-1A and MDH-E-1B) discharge to the general area after an air flow sample passes through the Particulate, Iodine and noble gas monitor (PIG).

1.3 System Design Requirements r

1.3.1 overall System Performance Requirementi The Mini Decay Heat Removal System is designed to remove 2.25 x 106 BTU /hr from the Reactor Coolant System using one pump and one heat exchanger. This is sufficient to remove the decay heat generated on August 1, 1979 or any lower heat load thereaf ter s

and transfer it to the ultimate heat sink (i.e. river water) via the Nuclear Services Closed Cooling Water and Nuclear

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Services River Water Systems. This heat removal ra~ce is satis-

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fled by e-MDHR system flow rate of 120 gpa @ 1750r with a T.N.S. system flow of 200 gpm and maximum TNS system temperature 0

of 1000F. The MDHR system design temperature is 200 F and design pressure is 235 psig.

1.3.2 Anplicable Design Codes and Standards for Piping and Components.

Manuf acturing Installation Description Code Code

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Connection to the decay heat ASME-ANSI system downstream of DH-V3 Section III B31.7 up to and including the first Class 2 Class 2 isolation valve.

Connection to the decay heat ASHE-ANSI system downstream of DH-V3 Section III B31.7 from the first isolation Class 3 Class 2 valve up to and including the second isolation valve.

Connection to the decay heat ASME-ANSI system upstream of DR-V4B up Section III B31.7 to and including the second Claso 2 Class 2 isolation valve.. =..

i N.S.C.C.W. System Connections:

ANSI B31.1*

ANSI piping up to isolation valve.

B31.l*

Isolation valves ASHE-ANSI Section III B31.l*

Class 3 Balance of Piping 2" Piping ANSI B31.1 ANSI B31.1 W/0. B.E. Seismic 4" Piping:

ANSI B31.1 ANSI B31.1 Heat Exchangers AS4E-Section VIII TEMA Standard (ASME Section III if avail-able) & sup-ported for 0.B.E. loads Pumps Hydraulic Institute Standards (ASME Section III if

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available)

Filter ASME-Section

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• Seismically supported for Category I loadings.

The portions of the system that are ANSI B31.7 Class 2 are seismic Category I.

The remaining portions of the system that j

convey reactor coolant are designed to Operating Basis Earthquake (OBE) loads. The balance of the system is designed non-seismic

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except the NSCC tie-in lines up to the isolation valves which shall be Category I seismically supported.

All system process piping and tubing lines are constructed of stainless steel and the cooling water lines are fabricated using carbon steel.

5 2.0 DETAILED DESCRIPTION OF SYSTEM 2.1 Components 2.1.1 Mini-Decay Heat Removal Pumps, MDH-P-1A & MDH-P-1B The Mini Decay Heat Removal Pumps (Table 1 and Figure 2) are single-stage centrifugal pumps rated at 120 gpm each with a developed head of 195 ft.

The pumps are provided with mechanical 4-shaft seals to minimize system leakage of radioactive water.

Seal injection is provided from the pump discharge thru a cyclone separator. The separator drain is routed back to the pump's suction. The mechanical shaft seals are provided with a demineralized water flush capability between the cyclone separator outlet and the seal inlet. This demineralized water connection will permit flushing of the durametallic seal faces just prior to securing the operating pump. The pre-shutdown flushing functions to remove the borated water from the closed I

loop seal injection system and thus prevents boron from crystal-izing on the seal faces. The crystalized boron on the mechanical sealing components could result in seal face damage and subse-quent leakage of radioactive water when the pump is restarted, d

The demineralized water seal supply comes from a local station

-. J quick disconnect via a removable hose. This supplies an isola-tion valve, flow meter and check valve (located outside the shielded MDHR pump cubical) before it ties into the outlet of the cyclone separator.

A failed seal's leakage is directed to the pump's base plate where it is drained to the floor drain system. This floor i

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drain system is part of the plant's Radwaste Disposal Miscel-laneous Liquids system shown on B&R Dwg. 2045. Consequently all floor drains in the MDHR area empty into the Auxiliary Building sump from which it is pumped into the Auxiliary Building Sump Tank.

From this tank, the liquids can be directed to almost any i

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dther part of the plant's radwaste liquid system. Existing i"

traps in the floor drains prevent gases from leaking out of the drain lines and into areas which are not ventilated by the MDHR Pump Cubicle Ventilation system. Airborne radiation monitors will detect grnss leakage indicating a seal failure.

The pump's are supplied with a constant level oiler in the

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bearing frame. Each MDHR pump casing drain plug has been provided with a 1/2" SS pipe nipple and screwed cap. This will permit " bagged" draining of the pump casing following system flush and pump isolation for subsequent maintenance.

The pumps have minimum flow protection thru a common recircu-lation line back to the heat exchangers suction (i.e. Recircu-lation line Throttle Valve, MDH-V20, is always cracked open).

The MDHR pumps are located on the 280'6" level of the Fuel Handling Building to assure adequate NPSH during operation of the system when the reactor vessel head is removed.

The MDHR pumps are interlocked with the existing plant Decay Heat Removal Pumps, DH-P-1A and DH-P-1B, such that the MDH rumps will trip off if either DH pump starts. This prevents the e

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possibility of ovorpecccurizing the MDHR cystc3 if c dsecy h2ct pump is started when a Mini Decay Heat Removal Pump is in operation.

l The power supply to the pump motors, which are non Class IE, is supplied by redundant Class 1E Motor Control Centers and will be manually loaded on the Class 1E diesels in the event of a loss bfoffsitepower. The 15 hp pump motors are not Class 1E qualified. MDH-P-1A and MDH-P-1B are powered from MCC-2-11EA compt. 3AR and MCC-2-21EA compt. 3AR respectively. Control (start /stop/ spring return to normal) and indication for the pumps are on the local panel (MDH-FNL-1) in the 280'6" el. of the F.H. Bldg. and the remote panel (MDH-PNL-2) in the Unit II control room.

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2.1.2 Heat Exchangers MDH-HX-1A and MDH-HX-1B

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The Mini Decay Heat Removal System Heat Exchangers (Table 2) transfer the primary coolant heat to the Temporary Nuclear Services Closed Cooling Water System circulating through the shell side. The Nuclear Services River Water System, in turn, removes the heat from the Nuclear 3ervice Closed Cooling Water heat exchangers and transfers it to the Mechanical Draf t Cooling z-[

Towers.

The MDHR heat exchangers are of the "U" tube design with Tempo-rary Nuclear Service Closed Cooling Water on the shell side and the reactor coolant on the tube side. The heat exchanger is designed in accordance with the ASME Code,Section III, Class 3, 1971 Ed.

The tubes have been seal welded int, the tube sheet.

The heat exchangers are located on the 280'6" elevation of the l

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Fual Handling Building. The Temporary Nuclear Services Closed Cooling Water inlet isolation valve to the coolers is inter-locked to close on a flow imbalance on the shell side of the cooler which would be indicative of a tube rupture or piping leak in the TNS system non-safety piping.

i Relief valves are provided to prevent thermal over pressurization of either the shell or tube side when the MDHR heat exchangers are isolated.

2.1.3 MDHR Inlet Debris Filter, MDH-F-1 The Inlet Debris Filter (Table 3) has been designed to handle the debris that may be in the DH drop line when the system is started.

It is a specially designed filter which fits into a i

lead shielded portable cask. The filter is considered a "one-

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shot" filter because the elements are not replaceable (however,

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the filter / cask unit is replaceable. The unit is constructed of

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Type 304 stainless steel with an all welded design having 3" inlet / outlet flanges and 1/2" vent / drain connectors. Additionally the inlet and outlet pipe stubs on the filter unit are provided with 1/2" tubing, valve and quick disconnect. These are located external to the cask and permit draining the inlet / outlet connections below the flange connections prior to filter removal or replacement. It is a pressure vessel designed in accordance with the ASME BPVC Sect. VIII Div. I requirements.

The unit is located in the F.H. Bldg. on the 280'6" elevation within the i

shield cask. This cask has an exterior shell consisting of a l

4 pipe spool 28" 0.D. with top and bottom plates all constructed of carbon steel. Four casters weldei to the bottom plate

'. 4-provide mobility for filter change out and will facilitate easy recoval from its installed location. Internal lead shielding of the cask consists of 2" top and bottom with 3" on the vertical cylinder portion. After the "one-shot" usage of the filter it will be isolated, bypassed, and properly disposed of.

If additional filtration is required, tha daoleted filter will be replaced with a duplicate unit.

2.1.4 MDHR Air Filtration Fans (MDH-ElA & 'IDH-ElB) and Pre-Filter /H.E.P.A.

Filter Enclosures (MDH-F-1A/2A & MD'.-F-1B/2B)

These redundant MDHR air filtration units (see Table 4 for fans and Table 5 for filters) function to exhaust air from the cubicals, filter the air, and transfers the air to the general

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area. This maintains acceptable temperatures in the cubicles, i

limits the buildup of contamination in the cubicles to permit l._

maintenance, and minimizes the spreading of contamination. The t

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i existing F.H. Building air supply duct discharges 2900 cfm to the MDHR heat exchanger room where 900 cfm is drawn from the room into the Reactor Building Chase and 2000 is directed to the MDHR Pump Cubicle. The operating MDHR fan will exhaust 2200 cfm from the pump cubicle. Two thousand cfm is transferred from the heat exchange room and 200 cfm infiltrates from the general area for the total of 2200 cfm. This flow passes thru a common 2

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inlet balancing damper (D-109) and the motor operated damper upstream the operating filtration unit. The air then flows through the filtration unit. Each filtration unit contains two filter housings in parallel, each containing a pre-filter and HEPA filter. The flow proceeds thru the fan and out the motor operated discharge damper where it combines into a common discharge from the idle fan / filtration unit. The air is then i l

exhausted to the general area at elevation 280'-6" af ter the leJ flow is measured / alarmed and an airborne radiation sample is continuously monitored.

Each filtration unit is furnished with a differential pressure indication switch with a high d/p alare.

The fans (MDH-E-1 A/lB) are controlled from local control switches on MDH-PNL-1 and are interlocked to open their respective motor operated supply and discharge dampers when the unit is started.

Power for the fans is supplied by MCC IlEA compt. 2ARR for MDH-E-1A and MCC 21EA compt. 2ARR for MDH-E-18.

2.1.5 Major System Valves Mini Decay Heat Removal Suction Header Isolation Valves, MDH-VI and MDH-V2 o

Two 600 psig (ANSI Rating), 2 inch stainless steel, electric a _,

motor operated globe valves in series are provided in the inlet suction header to the MDHR system. These valves provide redundant isolation capability from the tie-in to the ADHR system and DH system. Both valves are closed except when the Mini-Decay Heat Removal System is in operation. The electrical power to the valve motors is supplied from the redundant Class 1E j

buses. MDH-VI receives its power from MCC-2-IlEA compt. 2BF and is controlled from panel 8A in the control room (formerly used to control DC-V114). MDH-V2 receives its power from MCC-2-21EA compt. 8BR and is controlled from panel 15 in the control room (formerly used to control WDL-V271).

Mini Decay Heat Removal Discharge Header Isolation Valves, MDH-V18 and MDH-Vl9 Two 1500 psig (ANSI Rating), 2 inch stainless steel, electric motor

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operated globe valves in series are provided in tha discharge header J ' he MDHR system tie-in to the ADER system. These valves provide redundant isolation capability from the DH system and primary system boundaries. Both valves are closed except when the Mini-Decay Heat Removal system is required to operate.

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The existing plant Class 1E buses provided redundant power to t

the valve's motor operators. MDH-V19 receives its power from MCC-2-11EA compt. 3DF and is controlled from panel 15 in the control room (formerly used to control WDL-V1126). MDH-V18 receives its power from MCC-2 -21EA compt. 7BF and is controlled from panel 8A in the control room (formerly used to control DC-V115). MDH-V18 has the capability of jog control if it is deemed necessary to throttle MDHR system outlet flow from the control room.

Nuclear Sdrvices Closed Cooling Water Supply Isolation Valve to Temporary NSCCW. TNS-V1007 One 350 psig, 3000F, 4 inch, stainless steel, electric motor operated gate valve is installed in the NSCCW supply line upstreen of the Mini Decay Heat Removal Heat Exchangers (Re-tagged from BS-V4A which was spared). This valve provides the system boundary change from Seismic I, SC piping to Seismic II,

, t-conventional piping. The valve motor operator has been provided with a Class IE power supply from MCC-2-21EA, compt. 6BF and is h-manually controlled from panel 8A in the Control Room (formerly used to control DC-V103). Additionally the valve is interlocked to close and isolate the NSCCW supply to the MDHR heat exchangers if the outlet flow exceeds the inlet flow to the heat exchangers i

or visa versa. The purpose of this is to prevent the spread of contamination to the NSCCW systen in tha svant of a tubs rupturo in the MDHR heat exchangers or isolate the coolers if a piping leak occurs in the TNS system (i.e. isolates the safety portion of the NSCC from the non-safety TNS piping). The valve's nuclear classification is N-3, quality level Q-3, Seismic I, and Cleanliness class D.

MDHR System Remote Flushina, Draining and Vent Valves:

MDH-V21, MDH-V22, MDH-V29, MDH-V30, MDH-V32, MDH-V34, MDH-V35, and MDH-V36. The primary side of the MDR system has been designed with the capability for remote isolation, draining, flushing and venting to minimize radiation exposure to mainten-

-,1 ance personnel. Eight 235 psig, 2000F, 2 inch, stainless steel, air operated Tufline plug valves, which fail close on

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loss of air or electric power, have been incorporated into the

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system to accomplish this. All the valves have their key lock control switches and indication on the local control panel, MDH-FNL-1, located on the 280'6" elevation of the Fuel Handling Building. The valves are classified conventional, quality level Q-3, Seismic I, and cleanliness class C. Valves MDH-V21 and MDH-V34 are the demineralized water flush supply valves for system flushing and debris filter flushing respectively. Check 25 valves are located downstream of the above valves immediately adjacent to the MDHR system to prevent contamination of the D.W.

system. Additionally, quick disconnects upstream of the remote flush valve are only installed when required for flushing.

Valves MDH-V30 and MDH-V35 located upstream of the debris filter (MDH-F-1) and valves MDH-V36 and MDH-V29 located downstream of the!

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filters provide the cepsbility to isolete ths filter from th2 i

system and flush the connections to the floor drains before removal.

MDHR system remote venting is facilitated by opening MDH-V32 remotely during system draining.

The Air & Cas Vent, MDH-U-1, I

j elocated downstream of MDH-V32 prevents overflowing the MDHR system.

1 Valve MDH-V3 2 will be opened when the system is to be refilled to

$3 ensure a solid system.

The solenoids for the above eight valves and MDH-V28 receive I

their power from Misc. Power Panel MPF-1 supplied from MCC 2-3 2A, compt. 9 ARF thru a 30 KVA transformer.

Debris Filter Bypass Valve, MDH-V28

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A remote operated 235 psig, 2000F, 2 inch, stainless steel, air operated Tuf'ine plug valve, which fails open.on loss of air or electric power, is provided as a bypass around the inlet debris filter (MDH-F-1).

The valve has its keylock control switch and indicating lights on the local control panel, MDH-PNL-1,

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and is opened when flow thru the Inlet Debris Filter is no longer required. MDH-V28 is a conventional valve, quality level Q-3, Seismic I, and cleanliacss class C.

t-Relief Valves Relief valves are installed where necessary to protect the system's heat exchangers and piping from overpressurization.

The shell side of the MDHR Heat Exchangers, MDH-HX-1A and MDH-HX-1B, have Crosby 3/4" x 1" relief valves in-j stalled (TNS-V1002 and TNS-V1008). These relief valves

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have setpoints of 150 psig at 200 F with a capacity rating of 12 gpm.

The tube side of MDH-HX-1A and IB, have Vapor Corp.

3/4" x 1" relief valves installed (MDH-V4A and MDH-V4B).

These reliefs have setpoints of 235 psig with a capacity rating of 53.5 gpm.

Iho MDH pumps, MDH-P-1A and IB, each have Vapor Corp. 3/4" x 1" relief valves (MDH-V8A and MDH-V8B) installed on the pump's discharge. The reliefs have a 2eepoint of 235 psig with a discharge capacity of 53.5 gpm.

Manual Operated Valves With Extension Handwheels The MDHR Heat Exchangers shell side (TNS) cooling water supply and return line isolation valves (4" gates) are provided with extension handwheels that penetrate an existing 2' thick shield wall on the H.X. North side. MDH-HX-IA and IB have their inlet valve handwheels (TNS-V1004 & Th3-V1006) located in the vicinity of the shielded debris filter (MDH-F-1).

The outlet valve handwheels (TNS-V1001 and TNS-1003) are located within the MDHR pumps cubicle enclosure bb and the manipulation will require the operating pump to be shutdown and the primary side lines flushed before the valves can be operated.

The primary side of the MDHR Heat Exchangers is provided with 7' diaphragm valves operated with remote handwheels on the inlet, outlet and cross connect valves.

Inlet valves MDH-V-3A and 3B and outlet valves MDH-V-6A and 6B have their extension handwheels located in the pump cubicle. MDHR crossconnect valve, MDH-VS, 2

also has it's remote handwheel located in the pump cubicle.

Operation of these valves MDH-V3A/3B, MDH-V5, and MDH-V6A/6B '

will require the system to be shutdown and the primary lines flushed to reduce radiation levels before entrance to the MDHR pump cubicle.

MDHR Pump Suction and Discharge 2" diaphragm valves, MDH-V7A/B and MDH-V12A/B respectively, have their remote handwheels located on the 2' thick north shield wall of the pump cubicle for pump isolation should a flange or seal leak occur. The MDHR system's minimum recirculation throttling valve, MDH-V20, and outiet 4~

isolation valve, MDH-V15, are 2" globe type with their extension handwheels located on the north shield wall of the pump cubicle.

The manual remote valve associated with the MDHR system remote draining is MDH-V33, which functions t o drain the entire system.

~-

~

This 1" plug valve has its extension handwheel located on the

~-'

pump cubiele's 2' thick north shielt. wall at the en-tern corner.

2.2 Instrumentation, Controls, Alarms and Protective Devices As indicated on Table 6, the Mini Decay Heat Removal System is largely controlled from the local (MDH-PNL-1).tnd remote (MDH-PNL-2) panels located on the 280'6" el. of the F.H. Bldg. and the Control Room respec-tively. System isolation capability of both tne primary coolant side and

_=

~ ~~' ;

NSCCW side have their controls on C.R. panels 8A and 15.

These isolation valves (MDH-VI, MDH-V2, MDH-V18, MDH-V19 and TNS-V1007) are powered from Class IE Motor Control Centers using existing starter circuits spared as a result of system inoperability. The v'alves previously powered by the MCC starters will not be required to operate until their respective systems are repaired during the recovery operation (i.e. WDL-V0271, WDL-V-1126, DC-V-103, DC-V-Il4, DC-Vll5). __

Controls for valves used during remote flushing, venting and draining operations are located on the local control panel, MDH-PNL-1, in the F.H.

Bldg. 280'u" elevation.

Multi-f taccion process monitors on the local and remote panels are used to display pressure, temperature and flowrate.

2 MDH-P-IA/B have on/of f/ spring return to normal switches on the local and remote panels. Suction and discharge pressure indications for each pump are available on the local instrument rack and on the process monitors.

The pumps are interlocked with the main decay heat pumps to trip if DH-P-1A or B is inadvertently started.

The heat exchanger's primary side instrumentation consists of inlet and outlet temperatures and is displayed at the process monitors.

High individual heat exchanger outlet temperature is also alarmed in each process monitor. Local inlet pressure to each heat exchanger is available on the local instrument rack.

Primary side system flow rate readout is available on both process monitors with low flow being alarmed.

The heat exchanger's secondary side instrumentation consists of islet and g,

, - + ' -

outlet. flow indication on the local and remote panels. The flow differ-ences are used to signal the automatic closing of TNS-V1007 (i.e. outlet flow greater than inlet flow or visa versa) and alarm the condition on the local and remote panels.

Three area gamma radiation monitors are provided on the 280'6" elevation j

of the Fuel Handling Building. They are located in the vicinity of MDH-P-1A, MDH-P-1B, and the MDH heat exchangers. Each one has indication l

i l

l adjacent to the local panel and on the remote panel with a common alarm ar.aunciator on each panel.

"te controls and indication associated with the MDHP air filtration system are located at the equipment or on the local control panel, MDH-FNL-1.

MDH-E-1A/1B have on/off contrcl switches on the local panel with interlocks to their respective suction and discharge motor operated dampers to open them when the fan is running. The prefilter and HEPA filter assemblies are provided with local differential pressure indication, p_

a local high alarm and a common high d/p alarm on the remote panel.

Exhaust air flow from the fans is indicated / alarmed locally with a low flow alarn on the remote panel. Additionally an airborne radiation monitor samples the air af ter the filters to alarm an abnormal condition c.-

locally and remotely. Valving is provided to allow an air sample to be taken before tha filters.

~

A closed circuit TV eystem is provided to aid in system surveillance during operation such as monitoring the system for fluid leakage; pump seal failure; relief valve lifting or system flushing and draining to floor drains. The system consists of two TV cameras strategically located in the MDHR pump enclosure and heat exchanger room. The TV monitors and necessary controls are mounted on separate racks in the

-Ia_d l-Cable Room at the 305' 0" elevatica of the control building. Camera

!r

' 4.

9 MDH-TVC-1 is mounted on the south wall of the MDHR PUHP enclosure, opposite the centerline of the shield wall dividing the pumps and is approximately 4 feet off the floor. It is provided with a PAN-Tilt mechanism to allow remote movement of the camera to permit scanning both pump's areas. Additionally the camera is fitted with a 30-150 mm zoom lens with remote focusing to facilitate detailed inspection of the pump a

components and piping. The camera is normally left pointed away from any direct line view of a radiation source. This will lengthen the life of the lense.

i Camera MDH-TVC-2 is mounted on an I-beam near column AF & A67, approxi-matcly 7 feet above the floor facing east towards the MDHR heat exchangers t

to view relief valve sight glasses / valve positions.

It is provided with the same remote control features as MDH-TVC-1.

Each pump cubicle is provided with 4-100 watt incandescent lamps and the heat exchange rooms existing plant lighting has been augmented by three additional fluorescent fixtures having 3-40 watt lamps to insure adequate lighting for the TV All lighting fixtures in these areas were lamped or relamped cameras.

with the longest life bulbs / tubes availabla: to lengthen or eliminate relamping requirements since these areas will be inaccessible during normal operation.

The Mini-Decay Heat Removal Pumps, MDH-P-1A & IB, are provided with a "Vibralarm" vibration monitoring system to continuously monitor the pump's bearing housings for impending failure so that corrective action can be taken. Each pump has two single axis accelerometer sensors attached to the bearing housing to sense vibration in the vertical radial l

4 and horizontal radial direction (see Table 6 for details). The acceler-

' }g.

ation levels measured by the sensors are transmitted to the locally i

mounted Vibralarm Monitors near MDH-PNL-1 and are converted to velocity levels in inches /sec. One monitor for each pump indicates " alarm" and l

" shutdown" levels for each sensor via white and red indicator lights on the face of the panel. Also an amber indicating light is provided on the face of the panel to alarm: sensor, cable or input electronics failure.

I Internal to each monitor panel are the calibration controls and a velocity level indicating meter which cen be selected to recd channel 1 or 2 (i.e.

vertical or horizontal sensor). These local monitors are tied to the control room panel, MDH-PNL-2, via a common trouble alarm which will annunciate if any of the local alarms actuate.

l The Mini-Decay Heat Removal Filter (MDH-F-1) is provided with differential pressure indication and high d/p alarm on the local panel (MDH-PNL-1) while the control room panel (MDH-PNL-2) is provided with a high d/p alarm only. This inr.trumentation will provide guidance as to when to bypass the filter or replace it.

3.0 PRINCIPAL MODES OF OPERATION i

s i

3.1 Startup When it is desirable to switch cooling nodes of the R.C.S. from any given AU mode r forced circulation using the Mini Decay Heat Removal Syrcem, the following will be p'erformed. One of the MDHR pump enclosure fan / filter units will be started to exhaust the air around the pumps thru HEPA filters. The operation of the fan / filter unit is required to minimize the potential spread of airborne contamination into the balance of the F.H. Building should a leak develop in the MDH system. The Fuel Handling Building H&V systen should be operating prior to starting the system.

-.22II The MDHR system primary side will be filled and vented with borated water at a 3500 ppm Boron concentration. Nuclear Services Closed Cooling Water flow is established on the secondary side of the MDHR heat exchanger I

selected for service via the Temporary Nuclear Services Closed Cooling Water Subsystem tie-in to the "A" Spent Fuel Cooler (i.e. SF-C-1A is no i

longer operable). The "B" heat exchanger will normally be selected as 1

the' lead cooler with MDH-HX-1A isolated on the shell and tube sided by

.w

closed outlet valves. A mininum flowrate of 50 gpm will be set by throttling NS-V31A. The flowrate is not ta exceed 245 gpm to prevent j

starving other components in the NSCCW system.

A valve line-up of the MDHR primary side will have the inlet and outlet remote isolation valves (M0H-V1,2,18 & 19) closed. The flow path will be arranged for flow thru the debris filter (MDH-F-1) with the bypass valve f

closed (MDH-V28). Heat Exchanger "A" will be isolated by its closed outlet valve (MDH-V6A) and the HX cross connect valve (MDH-VS) is closed to direct flow to the perferred "B" side heat exchanger.

Similarily the "A" side MDHR pump is isolated by closed suction and discharge valves (MDH-V7A & 12A) to allow the "B" side MDHR pump to operate as the lead pump. The MDHR pumps l

4 minimum recirculation valve (MDH-V20) will be opened 1 full turn to allow a g,J 10-15 gpm flow at shutoff head of the MDHR pump.

l~_

The Decay Heat Removal System will be sligned to interface with the MDHR i

system by verifying open DH-V2 and then opening DH-V1 (or DH-V171), DH-V3 l;.

t and DH-V4B.

The MDHR system suction isolation valves (MDH-V1 & 2) are 1

opened to r.essurize the system to Reactor Coolant System pressure which will result in a static pressure at the "B" pump's suction of approximately 100 + 10 psig as indicated by MDH-PI-2B-2 or -3.

If this static pressure exceeds 115 psi the MDHR system will be manually isolated by closing MDH-V1 &

7.

2 and the RCS pressure decreased by increasing the letdown or RCS leakage.

The preferred MnFR pump (MDH-P-1B) will be started from the local (MDH-PNL-1) or remote (MDH-Pql-2) control panel and initial data will be taken to confirm proper operation whfle it is in the recirculation mode via MDH-V20. MDHR system outlet isa'.s tion valve MDH-V19, will be opened and MDH-V18 jogged l3 open gradually till 100 gpm is indicated os the system outlet flow meter (MDH-FIAL 2 or 1-1).

2

.-.- ~ -.

O t

During system startup the radiation levels on contact with the MDHR filter shield cask will be measured immediately and regularly thereaf ter to determine contact radiation levels.

From then on contact readings will be taken periodically to identify trends in the buildup of contact radiation levels.

l The criteria for changeout of the MDHR filter cask assembly is based on an administrative radiological limit of I rem /hr. on ~ contact. with the cask i

j and/or a differential pressure across the filter in excess of 65 psig above l

the clean filter d/p. Refer to section 3.4.2 for details on debris filter l

replac ement.

i 3.2 Normal Operation The MDHR system presents a forced flow option for core cooling. If the I

I system is put into operation it may remain in service until complete defueling of the reactor core has taken place (approximately 3 years).

Normal system fluid parameters may be monitored along with the area radiation levels in the 280'6" elevation of the F.H. Bldg. As decay heat generation rate is reduced with time, reactor coolant system temper-ature vill slowly trend toward the TNSCCW temperature. Heat removal rate can be reduced to control the RCS cool down rate by throttlin; the TNSCCW e

flow with the "A" Spent Fuel Cooler outlet valve, NS-V31A. The primary coolant outlet temperature to the MDHR heat exchanger shall be maintained 4.

above 100 F.

The Standby Reactor Coolant Pressure Control System

' \\~.c

?

(SPC) will be controlling the MDHR system pressure.

If it becomes necessary to shif t operating pumps, the - standby pump will be placed in service prior to securing the operating pump.

The operating pump's i

mechanical seal must be flushed with demineralized water prior to securing it per the method of section 3.4.5.

MDH-P-12 is considered to be the

~

normal operating pump because of its superior access for aintenance.

Pump MDH-P-1A will be used only as a temporary backup while maintenance

. i

-as r

r n

is performed on the IB pump. Heat Exchanger swapping will require

~

shutting down the system, and flushing to reduce radiatiot levels to gain access to the H.X. isolation valves.

During the normal system operation, reactor coolant is taken from the "B" side 36" reactor outlet line through a 12" line with two high pressure I

electric motor operated valves in series, DH-V1 and DH-V2.

The flow exits the Reactor Building through penetration R-525 and immediately passes through an electric motor operated valve, DH-V3.

The 8" Westing-house Alternate Decay Heat Removal System tie-in is located directly downstream of DH-V3.

This tie-in is isolated by two Westinghouse electric motor operated valves ADH-V01 and ADH-V02 before the line terminates in the valve pit outside the west wall of the Unit 2 Fuel Handling Building.

A 2" line connects to the 8" Westinghouse ADH system line downstream of

~

DH-V3 to serve as the suction line for the MDHR system. Two electric motor aperated isolation valves in series (MDH-VI and MDH-V2) are installed in the 2".line upstream of the demineralized water flush connection and inlet debr!s filter (MDH-F-1) with bypass valve (MDH-V28). The line then connects to tce suction header of the parallel MDH heat exchangers which are provided with inlet and outlet diaphragm valves with extension handwheels. A 2" h'at exchanger cross connection line exists downstream of MDH-HX-1A but upstream of MDH-HX-1B to allow them to be operated in series. The 2" discharge lines froct the HX outlets combine into a common header and are routed to the parallel MDHR pumps. Upstream of the pumps the sample return line ties in from the Temporary Nuclear Sampling System.

Each MDH pump is provided with suction and discharge manual diaphragm valves with remote handwheels and a discharge check valve to prevent reverse flow in the nonoperating pump. The pumps discharge into either a full flow recirculation line or the system's outlet isolation valve, MDH-V15, before proceeding to the system's electric motor operated outlet isolation valves, MDH-V18 and MDH-V19. MDH-V18 has been provided with jog control capability I

from the control room and will be the normal method of throttling MDHR system f outlet flow.

(Note : MDH-V15 and MDH-V20 have handwheel extensions for

_9 I

remote adjustment of flow.) Upstress of MDH-V18 & MDH-V19 are located the l

system's remote drain valves, sampling system supply line, and system flow element. Upstream and downstream of the system outlet isolation valve (MDH-V15) are located tie-in connections with double isolation valves for a future demineralization system. The 2" system discharge line connects to the 6" B return loop of the Westinghouse ADHR. The 6" line is isolated on the deadend side by ADH-V07B and ADH-V06B and connects into the 10" Decay Heat line upstream of DB-V-4B.

Downstream of DB-V-4B the line penetrates the Reactor Building where it joins with the B side 14" Core Flooding line to the Reactor Vessel, completing the flow path.

3.3 Shutdown The MDHR system is removed from service by closing the NSCCW supply to SF-C-1A via NS-V30A and closing the operating MDHR H.I. outlet valve (TNS-V1006 for B or TNS-V1004 for A).

Primary side outlet valves MDH-V18 and MDH-V19 are closed from the control room. The operating MDER edi pump (usually MDH-P-1B) will be tripped af ter the mechanical seals are

~ -d_

flushed with demineralizer water per section 3.4.5.

Inlet and Outlet isolation valves for tha pump will be closed (MDH-V7B/12B or MDH-V7A/12A) l al'ong with the primary side 121et valves MDH-V1 and V2.

The "A" Spent Fuel Cooler outlet valve (NF-V31A) is closed. If shutdown has occurred for maintenance purposes then refer to section 3.4.1 on Remote Flushing, Draining & Venting..

3.4 Special or Infrequent Operation 3.4.1 Flushing, Draining & Venting the System Remotely to Reduce Radiation Levels for Maintenance Should it be required, for any reason, to enter the MDHR heat 4~

exchanger room and/or pump cubicle it may be necessary to shut down the system and drain / flush it to reduce the area radiation levels to an acceptable level. This evolution will consist of shutting down the MDHR System as described in Section 3.3.

The system's following in-line process valves will be verified open or opened: inlet / outlet / bypass valves for MDH-F-1 (i.e. MDH-V30/

-35/-36/-29/-28 from MDd-PNL-1), suction / discharge valves for MDH-P-1A/B (i.e. MDH-V7A/-7B/-12A/-12B from extension handwheels on pump cubicle's north shield wall), and MDHR system recirculation /

~

~

discharge valves (i.e. MDH-V20/-15) from extension handwheels on pump cubicle's north shield wall). It is not feasible to open

~

the primary side flow paths for both heat exchangers because of ALARA onsiderations (i.e. HX inlet / outlet / bypass valve extension handwheels are ic sted in the MDHR pump cubicle).

The system is vented by opening vent valve MDH-V32 from local panel MDH-PNL-1.

System drain valve MDH-V33 is opened only enough

~'

to prevent overflowing the floor drain using its manual remote handwheel. Filter inlet / outlet drains MDH-V47/48 are also partially opened. When draining is completed as determined by the TV monitor observing the MDH-P-1B pump cubical's northeast corner, where the floor drain is located, the above three drain valves are closed.

If If the area radiation levels in the MDHR pump cubicles decrease

)

i sufficiently, the H.I. isolation / bypass valves (MDH-V3A/6A/5) should be opened prior to securing draining.

The system is refilled with demineralized water by installing the demineralized water quick disconnect hose at DW-V238 and opening DW-V238. The demineralized water supply valve, MDH-V21, is opened from panel MDH-PNL-1 and filling proceeds until air ceases flowing from the Air & Gas Vent (MDH-U-1) downstream of MDH-V-32.

MDH-V32 &

i MDH-V28 are closed from panel MDH-PNL-1 and the system flushing valve, MDH-V22, is opened from panel MDH-PNL-1.

Demineralized Water flushing of the system will commence and run for 5 minutes and be monitored by observing the drain in the southwest area of the heat exchanger room with the T.V. monitor. The inlet / outlet valves for MDH-F-1 (MDH-V30/29) are closed and the bypass valve opened (MDH-V28) to allow a new flush path for 5 minutes. Flushing will be secured by closing MDH-V21, V22 and DW-V238 (disconnecting supply hose).

The system vent isolation valve (MDH-V32) and drain valve (MDH-V33) are reopened to allow complete draindown.

The system will be restored to startup status af ter maintenance by performing the MDHR primary side valve line-up then refilling with 3500 ppm borated water using a portable mix and fill

_.[,jf apparatus.

3.4.2 Debris Filter Replacement Af ter initial operation of the MDHR system with the inlet debris filter, MDH-F-1, in service it may become necessary to install 9

the backup filter due to a high pressure drop and/or conta't radiation levels on cask exceeding 1 rem /hr.

Installation and j

operation with the backup filter which results in very little increase in d/p will indicate that debris from the Decay Heat Drop Line has been removed prior to bypassing the filter.

For MDH-F-1 replacement the MDHR system must be shutdown as detailed in Section 3.3.

The filter's inlet and outlet isolation valves (MDH-V35 and MDH-V36) are closed from panel MDH-PNL-1.

HDH-DPS-35 root valves (MDH-V43 & -V44) are closed and vent valves (MDH-V45

& 46) are opened locally. Hoses will be connected to the quick disconnect fittings located downstream of MDH-V47 & MDH-V48 and connected to a container with an absolute filter vent. The inlet /

s outlet filter drains (MDH-V47/48) are opened to allow the liquid between the filter isolation valves to drain down to below the flange disconnect elevation. When the filter inlet and outlet lines have stopped draining, valves MDH-V45, - V46, -V47 and -V48 are closed and drain hoses removed.

The filter's

• let and outlet flanges can rapidly be disconnected, n

since the flange nuts are tack welded to the underside of the disconnect flanges. All flanges will be bagged to contain any dripping of radioactive liquid and the filter cask housing pulled 4

b':

out of its in5talled location. The flanges on the spent filter should be blind-tlanged and suitable gaskets installed / torqued before any extensive movement of the filter cask. A new filter cask housing will be reinstalled and the flange connections leak tested prior to putting tha MDHR system back in service.

l

.i t

3.4.3 Reactor Coolant System Water Clean-up Using Demineralization Tie-In (TO BE SUPPLIED LATER).

3.4.4 MDHR Pump / Piping Enclosure HVAC HEPA Filter Replacement HEPA filter replacement will be required when a high differential pressure is indicated across the prefilter/HEPA filter or the outlet airborne radiation monitor indicates the filters are not performing effectively. The standby fan / filtration unit (MDH-E-1A or MDH-E-1B) will be started from panel MDH-PNL-1 and the f

operating unit s top ped. Remove and replace both sets of pre-filters and HEPA filters from the secured unit. The filtration unit can serve as a backup unit after DOP testing is performed and completed.

3.4.5 MDHR Pump Mechanical Seal Flushing When an operating MDHR pump must be secured it is imperative the

"~

seals be flushed with demineralized water before it is isolated.

This operation will consist of connecting the demineralized water quick disconnect downstream of DW-V238 and opening the valve. The operating pump [MDH-PIB(A)] should be tripped and its suction and discharged isolation valves [(MDH-V7B(A) and MDH-V12B(A)] verified open. Also verify MDH-V20 is in " Minimum Recirc" position and close the system isolation valves (MDH-V1, 2, 18 and 19). The system drain valve (MDH-V33) should be cracked open till suction pressure at the tripped pump decreases to less than 40 psig, then close hDH-V33. The demineralized water supply valve [MDH-V41B(A)] is ope'ned for the MDHR pump

'**4 which has been tripped. Restart the tripped pump [MDH-PIB(A)]

and throttle open MDH-V33 until a flow of demineralized water of 1.5 to 2.5 gpm is seen on flow meter MDH-FI-7(6). After running the pump for 10 minutes, trip the pump and close MDH-V33.

The

~

demineralized water will have flushed out the borated water from the pump's seal block and the closed loop cyclone separator back to the process piping. Close D.W. supply valve MDH-V41B(A) when flow is no longer seen on MDH-FI-7,(6).

Close the tripped pump's suction / discharge isolation valves [MDH-V7B(A)/MDH-V12B(A)].

3.5 Emergency l

3.5.1 Loss of Off-Site Power In the event of loss of of f-site power,the MDHR pump in operation l

will stop and the four system isolation valves will remain in Y

their last position, but not energized. The air operated plug valves associated with the system's remote flushing, draining and venting (MDH-V34, MDH-V21, MDH-V30, MDH-V35, MDH-V36, NDH-V29, MDH-V32, MDH-V22) will fail closed on both loss of electrical power and air, which will stop the operation in progress. The filter bypass valve (MDH-V28) fails open on loss of electrical power / air to ensure a flow path is maintained through the MDHR system. The MDER HVAC Filter Unit in operation will also stop.

Instrumentation indication will be lost. Once O

the site Class IE diesel generator sets arm in operation the L,

above loads will be sequenced on the IE diesel generators manually to restore system operation and isolation capability.

3 5.2 Inadvertent Startina of Existina Plant Decay Heat Removal Pumps, DH-P-1A/or IB If either of the existing plant decay heat pumps, DH-P-1A or 1B, are inadvertently started, the operating MDER pump will auto-matically trip to prevent overpressurizing the MDHR system. The V-fg DH pump should be secured and the desired MDER pump restarted to restore system operation.

2-3 5.3 Loss of MDHR Pump (s) Cubicle Ventilation If the operating HEPA fan / filter unit trips or becomes foula '

the potential exists to spread airborne contamination into 4

portions of the Fuel Handling Building not occupied by the MDER 1

l l

system. The backup HEPA fan / filter unit should be immediately t

started to ventilate the MDRR Pump / Piping Enclosure so a negative pressure is maintained and any particulate airborne contamination i

is filtered.

l 3.5.4 Mini Decay Heat Removal Tube Failure j

If a primary side tube failure occurs on the operating MDR heat O

i b

exchanger, MDH-HX-1A or 1B, the inlet TNSCCW supply valve (TNS-V1007) will close due to the flow inbalance on the shell side. If operation must continue the af facted cooler should l

f be isolated and the backup cooler put into service. This will require system shutdown so the system can be flushed to j

reduce radiation levels and gain access to the heat exchanger 9

isolation valves.

3.5.5 Gross Systes Leakane

]

In the event of gross system leakage, the system can be isolated from the RCS by shutting the remote operated isolation valves i

(MDH-V1, MDH-V2, MDH-V18, and MDH-V19).

i j

4.0 HAZARDS AND PRECAUTIONS 4.1 Do not operate the Mini Decay Heat Removal pumps with the minimum recircu-4

• --g l

lation valve, MDH-V20, closed. If the discharge path is blocked, shutoff head operation of the pump (s) should not exceed one minete.

i 4.2 Do not operate the pumps with the suction valves (s) throttled or closed.

4.3 Since the system is handling radioactive contaminated fluids and potential airborne contamination due to leakage, all appropriate health physics i

i safety precautions"aust be observed during operation and maintenance.

l l l

i l

4.4 Recote flushing capability exists for the system's primary side piping to provide a means for reducing the radiation levels in the piping. Flushing 1

shall be performed before maintenance is begun.

4.5 Unless required for operation, a standby component (i.e. pump / heat exchanger / instrumentation) should be isolated by their outlet and/or

{

I.

inlet isolation valves or root valves tc eliminate potential leakage paths and/or crud traps.

i 4.6 The Fuel Handling Building Heating and Ventilation System should be operated in conjunction with the MDHR exhaust system when the MDHR Syster is operating. ' 2 -

4.7 Pump MDH-P-1B should always be considered the " PRIMARY" pump because of the ease of maintainability versus MDH-P-1A.

~

i

• O i

9

,'"

• h

i, TABLE 1 MINI DECAY HEAT REMOVAL PUMPS

-1 i

Pump Details Identification MDH-P-1A, MDH-P-1B Number Installed Two Manufacturer Goulds Pumps, Inc.

Model No.

3196 ST (1 r. 1-1/2-8)

Type Single-Stage, Horizontal Shaft, Centrifigal Rated Speed, rpm 3500 Rated Capacity, gpm 120 Developed Head, ft.

195 4'

Design Pressitre, Casing, psig 240 Design Temperature, F 200 Lubricant / Coolant Oil / Air Min. Flow Requirements 10 gpm for 15 minutes max.

Motor Details Manufacturer Westinghouse Type Squirrel Cage Enclosure Open Drip Proof Rated Horsepower, HP 15

-- ?

v Speed, rpm 3500 Lubricant / Coolant Grease / Air Power Requirements 460V, 3 Phase, 60 H, 18.5 amps (full load)

Power Source MDH-P-1A, MCC-2-IlEA compt. 3AR MDH-P-1B, MCC-2-21EA compt. 3AR i

4 4

[

TABLE 1 (Con't.)

i.

MINI DECAY HEAT REMOVAL PUMPS i

Classification j

Code N-3 i

Quality Control 3

1 t

i Seismic I

i i

Cleanliness B

+

1 i

i i

1 k

I eum i

n 9

4!

8 9

l I

I e

k

.m 4

7 4

.t t

~. - _

i o

TABLE 2 MINI DECAY HEAT REMOVAL COOLERS Identification MDH-HX-1A, MDH-HX-1B Number Required Two Vendor Babcock & Wilcox Manufacturer Atlas Industrial Mfg. Co.

Cleanliness Factor 0.85 Heat Transfer, BTU /hr 2.25 x 106 @ primary temp. -

1750F @ 120 gpm secondary temp. = 1000F @ 200 gpm Tube Side:

Flut?

Reactor Coolant Fluid Flow, lbs/hr 60,000 Design Pressure 235 psig

~

Tempe rature 200F b~

304 Stainless Steel Material Pressure Drop, psig 1.3 Shell Side:

Fluid Nuclear Services Closed Cooling Water System i

Fluid Flow, lbs/hr 100,000 Design Press. psig 175 psig

- e Design Temp. F 200F 2-Material Carbon Steel Pressure Drop, psig 8.3 i

9 4.*,

ee

==.see,e..

so*

.....m.

-,e

4 TABLE 2 (Con't.)

j MINI DECAY HEAT REMOVAL COOLERS Classification Shell Tube Code ASME Section III, 1971 Ed. with Addenda thru 1971 f

Quality Control 4

3 2

~ Seismic I

I Cleanliness C

B 9

4

+m b -

l

..J.

a

.I e

a,

P-

-.m e

-.r...~.

TABLE 3 MINI DECAY HEAT INLET DEBRIS FILTER Filter Details Identification MDH-F-1 No. Installed 1 & 3 Replacement Assemblies Manufacturer Fabricated on site i

Type Cartridge Casing Material 304 Stainless Steel Casing Dimensions 12-3/4" 0.D. x 26-1/4" high

-[

Size (Micron Removal Rate) 225 Operating Conditions 125 gpm @ 100 psig/155'F I

Design Conditions 235 psig @ 200'F Hydrostatic Test 353 psig 0 70' F Code ASME BPVC Section VIII Div. 1 i~

Seismic Class 2 - OBE l

4

=

.2 c.

i a

3.

TABLE 4 MINI DECAY HEAT REMOVAL SYSTEM AIR FILTRATION FANS Fan Details Identification MDH-E-1A & MDH-E-1B Number Installed 2

I.

Manufacturer New York Blower 3

Model No.

Size #12 S.W.S.I.

Type Centrifugal - upblast Rated Capacity, CFM 2200 Static Press in H O 6.5 2

3_

Rated Speed, RPM 4200 Fan Motor Details 3

Manufacturer Type Squirrel Cage Induction Motor Enclosure Open Rated HP 5

3 Rated Speed, RPM Lubricant-coolant Oil / Air e

Power Requirements 460 V./3 Phase /60Hz Power Source MDH-E-IA - MCC-2-IlEA compt. 2ARR MDH-E-1B - MCC-2-21EA compt. 2ARR

'Z Classification Code C

Quality 4

Seismic II Cleanliness D.

i

)

o a

TABLE 5 MDHR EXHAUST H.E.P.A. & PREFILTER FILTER ASSEMBLY H.E.P.A. Filter Details Identification MDH-F-2A/MDH-F-2B No. of Cells Installed / Train 2

Manufacturer Mine Safety Appliance Company HEPA Type Size 24" x 24" x 12" Capacity, CFM 1100 CFM per filter /2200 CFM per train Pressure Drop, Clean, in W.G.

1.1 Efficiency, %

99.97 Housing 2, Ultra-Lok Series "U",

Bag-In, Bag-Out Filter Retaining System Pressure Drop, Dirty, In W.G.

3.0 Prefilter Details Identification MDH-F-1A/MDH-F-1B No. of Cells Installed / Train 2

Manu fac turer Mine Safety Appliances Company Type Air-0-J Size 24" x 24" x 2" Capacity, CFM 1100 per filter /2200 per train Pressure Drop; Clean, in W.G.

0.15 Efficiency, %

30

' -4 Pressure Drop, Dirty, in W.G.

0.25 Classification Code C

Quality 3

Seismic II Cleanliness D -

j

e P:ge 40 TABLE 6 INSTRUMENTATION CONTROLS & ALARMS Input Output Id7ntification Description Function Location Type Range Range Setpoint TNS-FE-1 Flow Element Temporary NSCCW Inlet Flow Piping Orifice 0-400 gpa 0-4 00" W.C.

N/A to Heat Exchangers MDH-HX-Plate IA/IB TNS-FT-1 D/P Transmitter Temporary NSCCW Inlet Flow Local Fox Bor 0-400" W.C.

10-50 MADC N/A

~

to Heat Exchangers MDH-HX-MTG E13DM 1A/IB TNS-FDSH-1 Flow Diff. Alarm T.N.S.C.C.W Flow imbalance' PN L.

I Fox Bor 10-50 MADC N/A 7.0 gpa, between inlet and outlet 63U-ET-flow to MDH-HX-1A/lB ORAR TNS-FDAH-1 Annunciator T.N.S.C.C.W Flow imbalance PNL. 1 G.E. CR N/A N/A 7.0 gpa Ligh t between inlet and outlet 2940 flow to MDH-HX-1 A/IB TNS-FI-1A Flow Indicator T.N.S.C.C.W Inlet flow to PNL 1 Vertical 10-50 MADC 0-400 gpm N/A MDH-HX-1A/lB Millia-meter West VX252 TNS-FI-1B Flow Indicator T.N.S.C.C.W Inlet flow to PNL. 2 Vertical 10-50 MADC 0-400 gpm N/A MDH-HX-1A/lB Millia-meter k*est VX252 TNS-HS-1 Push Button T.N.S.C.C.W Flow Inbalance PNL. I G.E.

N/A N/A N/A

- Alarm Acknowledge CR2940 l

WA202B TNS-FE-2 Flow Element Temporary NSCCW Outlet Piping Orifice 0-400 gpm 0-4 00" W.C.

N/A Flow from Heat Exchangers Plate HDH-HX-1A/lB l

TNS-FT-2 D/P Transmitter Temporary NSCCW Outlet Local Fox Bor 0-400" W.C.

10-50 MADC N/A Flow from Heat Exchangers Mtg.

E130M MDH-HX-1 A/ lB i

J s.N.

i

P ge 41 TABLE 6 INSTRUMENTATION CONTROLS & ALARMS Input Output

,Id2ntification Description Function Location Type Range Range Setpoint TNS-FDSH-2 Flow Diff. Alarm Temporary NSCCW Flow PNL. I Fox Bor 10-50 MADC N/A 7.0 gpm &

Inbalance between 63U-ET-Inlet & Outlet Flow to OHAR l

MDH-HX-1A/lB TNS-FDAH-2 Annunciator Temporary NSCCW Flow PN L. 2 G.E.

N/A N/A 7.0 gpm-t Light Inbalance between CR2940 Inlet & Outlet Flow to HDH-HX-1A/IB

\\

TNS-FI-2A Flow Indicator T.N.S.C.C.W Outlet flow PN L.

1 Vertical 10-50 MADC 0-400 gpm N/A from MDH-HX-1A/lB Millia-meter c.

3 West.

VX252 TNS-FI-2B Flow Indicator T.N.S.C.C.W Outlet flow PNL. 2 Vertical 10-50 MADC 0-400 a..

N/A from MDH-HX-1A/lB Millia-meter West VX252 TNS-HS-2 Pushbutton T.N.S.C.C.W Flow Inhalance PNL. 2 G.E.P.B.

N/A N/A N/A Alarm Acknowledge CR2940 WA202B TNS-FHS-7 Hand Switch W/

Operates Temporary NSCCW PNL. 8A P.B. W/R N/A N/A N/A Ind. Lights Valve TNS-V-1007 Flow to

& C. Lights irr Exch. MDH-HX-1A/lB MDH-RE-1

-- Area Rad. Monit.

MDH-P-1A Area Radiation Local Gamma 0-lx107 N/A Ion MR/HR Chamber l'

MDH-RMI-1 A Indication / Alarm MDH-P-1A Area Radiation Adjacent Alarm 0.1-lx107 2.5 R/HR.

to PNL. 1 Rate-MR/HR meter Victo-reen 84 8 -5 l

0 h

J l

Pag'J 42 TAT 6

INSTRUMENTATION sNTROLS & ALARMS Input Output Idetification

_ Description Function Location Type Range Range Setpoint MDH-RMI-1B Indication / Alarm MDil-P-1A Area Radiation PN L. 2 Alarm 0.1-Ix107 2.5 R/IIR.

2 i

Rate-MR/HR i

meter i

Victo-reen i

848-5 lMDH-RE-2 Area Rad. Monit.

MDH-P-18. Area Radiation Local Camma 0-lx107 N/A Ion MR/HR Chamber l

MDH-RMI-2A Indication / Alarm MDil-P-1B Area Radiation Adjacent Alarm 0.1-lx107 2.5 R/HR.

to PNL. 1 Rate-MR/HR meter Victo-i reen 848-5 i

HDH-RMI-2B Indication / Alarm MDH-P-1B Area Radiation PNL. 2 Alarm 0.1-lx107 2.5 R/HR.

h Rate-meter Victo-reen 848-5 I MDH-RE-3 Area Rad. Monit.

HT.EXCH.COMPr. AREA Local Camma 0-lx107 N/A Radiation Ion MR/HR Chamber l

MDH-RMI-3A Indication / Alarm HT.EXCH.COMPr. AREA Adjacent Alarm 0.1-lx107 1.0 R/HR.

Radiation to PNL. 1 Rate-MR/HR l}

Meter Victo-reen 848-5 i

MDH-RMI-3B Indication / Alarm HT.EXCH. COMPT. AREA PNL. 2 Alarm O.1-lxl07 1.0 I/HR.

Radlation Rate-MR/HR h

meter

u

.b.

)

i i

i i

Pcga 43 TA' T 6 INSTRUMENTATIOh

>NTROLS & ALARMS Input Output f

Id ntification Description Function Location Type Range Range Setpotnti MDH-RAH-4 Alarm LT./ Horn Common Alarm for MDH-RE-PNL. I Light N/A N/A 2.5 or 1/2/3 1.0 R/HR MDH-RAH-5 Alarm LT./ Horn Common Alarm for MDH-RE-PNL. 2 Light N/A N/A 2.5 or 1/2/3 1.0 R/HR I

MDH-HS-4 Pushbutton Common Alarm for MDH-RE-PNL. 1 P.B.

N/A N/A N/A 1/2/3 Acknowledge Button MDH-HS-5 Pushbut ton Common Alarm for MDH-RE-PNL. 2 P.B.

N/A N/A N/A 1/2/3 Acknowledge Button

)

?DH-FE-1 Flow Element Mini Decay Heat System Piping Orifice 0-200 gpm 0-750" W.C.

N/A Flow Plate MDH-FT-1 D/P Transmitter Mini Decay Heat System Local Bailey 0-750" W.C.

4-20 MADC N/A Flow Rack BQ75221 MDH-FIALk-1 Indication / Alarm Mini Decay Heat System PNL. 1 Process 4-20 MADC 0-200 gpm 80 gpm

~

Flow & Low Flow Alarm Monitor MDH-FlAL-1-2 Indication / Alarm Mini Decay Heat System PNL. 2 Process 4-20 MADC 0-200 gpm 80 gpm Flow & Low Flow Alarm Monitor MDH-FI-2 Sight Flow Indicate Relief Valve Piping Flapper N/A N/A N/A Indicator MDH-V4A has lifted Type Ametek

1. 20-6120 MDH-FI-3 Sight Flow Indicate Relief Valve Piping Flapper N/A N/A N/A Indicator MDH-V4B has lifted Type Ametek

1. 20-6120 MDH-F I-4 Sight Flow Indicate Relief Valve Piping Flapper N/A N/A N/A Indicator MDH-V8A has lifted Type Ametek

1. 20-6120 MDH-FI-5 Sight Flow Indicate Relief Valve Piping Flapper N/A N/A N/A Indicator MDH-V8B has lifted Type Ametek

1. 20-6120

'l et t

<+ -

}

4 i

i

l Page 44 l

TA~ % 6 INSTRUMENTATIOh sNTROLS & ALARMS l

Input Output Id'~tification Des ription Function Location Type Range Range Setpoint MDH-FHS-1 Hand Switch Controls MDH-VI (was PNL. 8A Pushbut-N/A N/A N/A tagged DC-FHS-7086) ton W/R&G Ltgs.

MDH-FHS-2 Hand Switch Controls MDH-V2 (was PNL. 15 Pushbut-N/A N/A N/A tagged WDL-FHS-3189) ton W/R&G Ltgs.

t MDH-PI-1 A Press. Indica-MDH-HX-1A Inlet Pressure Local Press.

0-200 psig 0-200 psig N/A

)

tion Rack Cauge MDH-PI-1B Press. Indica-MDH-HX-1B Inlet Pressure 5 Local Press.

0-200 psig 0-200 psig N/A tion Rack Cauge MDH-TE-1A Temperature MDH-HX-1A Inlet Tempera-Piping RTD 0-2000F 92.93-136.49 N/A Element ture ohms MDH-T1-1 A-1 Temperature MDH-HX-1 A Inlet Tempera-PNL. I Process 92.93 136.49 0-2000F 175 F Indicator ture Monito r ohms MDH-TI-1 A-2 Temperature MDH-HX-1A Inlet Tempera-PNL. 2 Process 92.93-136.49 0-2000F 175 F Indicator ture Monitor ohms MDH-TE-2A Temperature MDH-HX-1A Outlet Tempera-Piping RTD 0-2000F 92.93-136.49 N/A Element ture ohms MDH-TIAH-2A-1 Tempera ture MDH-HX-1 A Outlet Tempera-PNL. 1 Process 92.93-136.49 0-2000F 1700F Indicator /

ture Monitor ohms Alarm MDH-TIAH-2A-2 Temperature MDH-HX-1A Outlet Tempera-PNL. 2 Process 92.93-136.49 0-2000F 1700F Indicator /

ture Monitor ohms Alarm MDH-TE-1B Temperature MDH-HX-1B Inlet Tempera-Piping RTD 0-2000F 92.93-136.49 N/A Element ture ohms t

e.

]

m,.

i

Pigs 45 TAa. _, 6 INSTRUMENTATION CONTROLS & ALARMS Input Output Idrntification Description Function Location Type Range Range Setpoint?

MDH-TI-1B-1 Tempe rature

);>H-HX-1B Inlet Tempera-PNL. 1 Process 92.93-136.49 0-2000F 175 F Indication ture Monitor ohns M)H-TI-1B-2 Temperature

.MDH-HX-1B Inlet Tempera-PNL. 2 Process 92.93-136.49 0-2000F 175 F Indication ture Monitor ohms MDH-TE-2B Temperature MDH-HX-1B Outlet Tempera-Piping RTD 0-2000F 92.93-136.49 N/A Element ture ohms MD'l-TIAH-28-1 Temp. Ind. &

MDH-HX-1B Outlet Tempera-PNL. 1 Process 92.93-136.49 0-2000P 1700F Alars ture Monitor ohms MDH-TIAH-2B-2 Temp. Ind. &

MDH-HX-1B Outlet Tempera-PNL. 2 Process 92 93-136.49 0-2000F 1700F Alarm ture Monitor ohms MDH-PI-2A-1 Press. Ind.

MDH-P-1A Suction Pressure Local Bourdan 0-200 psig 0-200 psig N/A Rack Tube MDH-PT-2A Press. Trans-MDH-P-1A Suction Pressure Lceal Bailey 0-200 psig 4-20 MADC N/A mitter Rack KS67221 MDH-PI-2A-2 Pressure MDH-P-1A Suction Pressure PNL. 1 Process 4-20 MADC 0-200 psig Low 16 ;

Indication Monito r psig 4

MDH-PI-2A-3 Pressure MDH-P-1A suction Pressure PNL. 2 Process 4-20 MADC 0-200 psig Low 16 Indication Monitor psig MMI-PI-3A-1 Pressure MDH-P-1 A Discharge Pressure Local Bourdon 0-300 psig 0-300 psig N/A Indication Rack Tube i

HDH-PT-3A Pressure MDH-P-1A Discharge Pressure Local Bailey 0-300 psig 4-20 MADC N/A Transmitter Rack KS67221 r,

MDH-PI-3A-2 Pressure MDH-P-1A Discharge Pressure PNL. 1 Process 4-20 MADC 0-300 psig Hi 220 Indication Monitor psig I

.c

}

Mi 6

i l

Pegs 46

_ T TA.

6 2

INSTRUMENTATION OONTROLS & ALARMS Input Output Id ntification Description Punction Location Type Range Ranae Setpoint; MMI-PI-3A-3 Pressure MDH-P-1A Discharge Pressure PNL. 2 Process 4-20 MADC 0-300 psig Hi 220 Indication Monito r psig g

MDH-PI-25-1 Pressure MDH-P-1B Suction Pressure Local Bourdon 0-200 psig 0-200 poig N/A Indication Rack Tube MDH-PT-2B Pressure MDH-P-1B Suction Pressure Local Bailey 0-200 peig 4-20 MADC N/A Transmitter Rack KS67221 MDH-PI-2B-2 Pressure MDH-P-1B Suction Pressure PNL. 1 Process 4-20 MADC 0-200 psig Low 16 Indication Monitor psig MDH-PI-28-3 Pressure MDH-P-1B Suction Pressure PNL. 2 Process 4-20 MADC 0-200 psig Low 16 Indication Monitor psig MDH-PI-3B-1 Pressure MuH-P-1B Dischargo Pressute Local Bourdon 0-300 psig 0-300 psig N/A Indication Rack Tube MDH-PT-3B Pressure MDH-P-1B Discharge Pressure Local Bailey 0-300 psig 4-20 MADC N/A 1

Transmitter Rack K567221 MDH-PI-38-2

' Pressure MDH-P-1B Discharge Pressure PN L. 1 Process 4-20 MADC 0-300 psig Hi Indicator Monitor 220 psig MDH-PI-3B-3 Pressure MDH-P-1B Discharge Pressure PNL. 2 Process 4-20 MADC 0-300 psig Hi i

Indicator Monito r 220 psig-MDH-CS-1 Hand Switch Controls MDH-P-1A PNL. 1 GE N/A N/A INTLK W/Ind. Lights CR2940 with US203E Pumps Dil-P-1 A, IB

'MDH-CS-2 Hand Switch Controls MDH-P-1A PNL. 2 GE N/A N/A INTLK W/Ind. Lights CR2940 with US203E Pumps Dil-P-1 A, '

l IB l

1. [e

}

o.

s i

i

P gs 47 T/ E6 l

INSTRUMENTATIO:.ONTROLS & ALARMS Input Output Idintification Description Function Location Type Range Range Setpoint:

MDH-C S-3 Hand Switch Controls MDH-P-1B PNL. 1 GE N/A N/A INTLK W/Ind. Lights CR2940 with US203E Pump:i Dil-r-1 A, IB MDH-CS-4 Hand Switch Controls MDH-P-1B PNL. 2 GE N/A N/A INTLK W/Ind. Lights CR2940 with US203E Pumps DH-P-1A.

IB i

MDH-FHS-18 Pushbutton Controls MDH-V18 (was PNL. 8A Mercury N/A N/A N/A w/R&G Lights tagged DC-FHS-7069)

E-30 MDH-FHS-19 Pushbutton Controls MDH-Vl9 (was PN L.

15 Mercury N/A N/A N/A w/R&G Lights tagged WDL-FHS-1332)

E-30 MDH-FHS-21 Handswitch Controls MDH-V21 PNL. 1 GE N/A N/A N/A Keylock (Demineralized Water CR2940 Supply Valve)

UN200D MDH-FHS-22 Handswitch Controls MDH-V22 PNL. 1 GE N/A N/A N/A Keylock (drain valve)

CR2940 UN200D MDH-FHS-28 Handswitch Controls MDH-V28 PNL. 1 GE N/A N/A N/A Keylock (MDH-F-1 Bypass Valve)

CR2940 UN200D MDH-FHS-29 Handswitch Controls MDH-V29 PNL. 1 GE N/A N/A N/A i

Keylock (MDH-F-1 Downstream CR2940 Isolation Valve)

UN200D i

MDH-FHS-30 Handswitch controls MDH-V30 PNL. 1 GE N/A N/A N/A t

Keylock (MDH-F-1 Upstream CR2940 l

Isolation Valve)

UN200D t

f iO -

6 i

4 I

Pags 4 8 TA' 6

INSTRUMENTATION -.,NTROLS & ALARMS Input Output Idtntification Description Function Location Type RanRe Range Setpoint MDH-FHS-32 Handswitch Controla MDH-V32 PNL. I GE N/A N/A N/A Keylock (MDHR System Vent Valve)

CR2940 UN200D MDH-FHS-34 Handswitch Controls MDH-V34 PNL. I GE

• /A N/A N/A Keylock (Demineralized Water CR2940 Supply Valve)

UN200D MDH-FHS-35 Handswitch Controls MDH-V35 PNL. 1 CE N/A N/A N/A Keylock (MDH-F-1 Upstream CR2940 Isolation Valve)

UN200D MDH-FHS-3 6 Handswitch Controls MDH-V36 PML. 1 GE N/A N/A N/A Keylock (MDH-F-1 Downstream CR2940 Isolation Valve)

UN200D MDH-DPIS-103 Differential Indicate & Alarm high F.H. Bldg Magnahelic --

0-6" 1I 0 3.3"W.C)[

2 Pressure Indicating differential pressure El. 280' 6" gage Switch across MDH-F-1A and A66 + 13' (3006SR)

MDH-F-2A filters All + 4 '

MDH-DPAH-103 Differential Annunicate high D/P PNL. 1 C.E.

N/A N/A 3.3" W.C.

Pressure Alarm across MDH-F-1A and CR2940 High (Amber Lt.)

MDH-F-2A filters MDH-DPIS-104 Differential Indicate & Alarm high F.H. Bldg Magnahelic --

0-6" H O 3.3" W.C..

2 Pressure Indicating differential pressute El 280' 6" gage Switch across MDH-F-1B and A66 + 17' (3006SR) l MDH-F-2B filters AH + 19' l:

MDH-D PAH-104 Differential Annunicate high D/P PNL. 1 G.E.

N/A N/A 3.3" U.G.

Pressure Alarm across MDH-F-1B and CR2940 (Amber Lt.)

MDH-F-2B filters MDH-FHS-105 Handswitch Provide control of PN L.

1 C.E.

N/A N/A Keylock MDil-E-1 A and supply /

US 203E discharge dampers (MDil-HV-101/110)

[.

N

{

l l

4 l

1

~.

Page 49 TABLE 6 INSTRUMENTATION CONTROLS & ALARMS Input Output Id ntification Description Function Location Type Range Range Setpoint MDH-FHS-106 Handswitch Provide control of MDH-E-1B TNL. 1 C.E.

N/A N/A N/A Keylock and supply / discharge dampers CR2940

,MDH-HV-102/lll)

US203E

(

N/A MDH-7E-107 Annubar Flow Measure discharge flow Ducting Elatent from MDH-E-1A and MDH-E-1B MDH-FISL-107 Flow Indicating Indicating discharge flow Ducting Magnahelic --

0-1" H O 1760 SCFM' 2

Switch (Low) from MDH-E-1A and MDH-E-1B A66 + 11' gage and alarm low flow 1

AK + 2' (300lSR) i MDH-FAL-107 Flow Alarm Low Annunicate low discharge PNL. 1 C.E.

N/A N/A 1760 SCFM (Amber Lt.)

flow f rom MDH-E-1A or CR2940 MDH-E-1B MDH-UA-107 Annunicator Alarm low discharge flow PNL. 2 C.E.

N/A N/A 1760 SCFN:

from MDH-E-I A or IB and C2940 Manual high DP across filter trains 3.3" P.G.

"HVAC TROUBLE"

' MDH-RAH-108 Annunicator Alarms high airborne Adj acent N/A N/A Later radiation from MDHR Pump to PNL. 1 Cubical Filtration System N/A N/A Later MDH-l'A-108 Annunicator Alarms high airborne PNL. 2 radiation from MDHR Pump Cubical Filtration System

. MDH-RMI-108P Radiation Monitor Indicate particulate air-F.H. 280' Victoreen --

10-106 cpm with Indicator /

borne radiation from MDHR el.

842-2 1 Alarm Pump Cubical Filtration Local System + Alarms: Hi-Red, Alert-Amber, Fail-Green MDH-RMI-108I Radiation Monitor Indicate iodine airborne F.H. 280' Victoreen --

10-106 cpm

'~'

with Indicator /

radiation from HDHR pump el.

842-31 Alarm Cubical Filration System +

Local Alarms: Hi-Red, Alert-Amber, Fial-Green 4

k b '.

j i

i

Page 50 TA

,6 INSTRUMENTATION CONTROLS & ALARMS i

Input Output Identification ~~'

Description Function Location Type Range Range Setpoint MDH-RMI-108G Radiation Monitor Indicate Noble gas airborne F.H. 280' Victoreen --

10-106 cp, with Indicator /

radiation from MDHR Pump el.

842-11 Alarm Cubical Filtration System Local Alarms: Hi-Red, Alert-Amber,

' Fail-Green MDH-RIA-108P-1 Radiation Indicate particulate air-Adj Pnl.1 Victoreen Indicator /

borne radiation from HDHR A66 + 4' 844-18 Alarm Pump Cubical Filtration AP + 0 '

System + Alarms for High-Red, Alert-Amber, and Fail-Green MDH-RIA-lb3I-l Radiation Indicate iodine airborne Adj. Pnl.1 Victoreen Indicator /

radiation from MDHR Pump A66 + 4' 844-18 Alarm Cubical Filtration System +

AP + 0' Alarms for High-Red, Alert-Amber, and Fail-Green MDH-RIA-108G-1 Radiation Indicate Noble gas airborne Adj. Pnl.1 Vic to reen Indicator /

radiation from MDHR Pump A66 + 4 '

844-18 Alarm Cubical Filtration System +

AP + 0' Alarms for High-Red, Alert-Amber, and Fail-Green MDH-RIA-108P-2 Radiation Indicate particulate airborne Pnl.2 Victoreen 10-106 cp, Ra teme ter/

radiation from MDHR Pump 908428 Alarm Cubical Filtration System +

Alarms for High-Red, Alert-Amber, and Fail-Green MDH-RIA-1081-2 Radiation Indicate iodine airborne Pnl.2 Victoreen 10-106 cpm Ratereter/

radiation from MD'IR Pump 908428 Alarm Cubical Filtration System +

Alarms for High-Red, Alert-Amber, and Fail-Green i

e l

[

g l

g

e Pegs 51 TABLE 6 INSTRUMENTATION CONTROLS & ALARMS Input Output Idrntification Description Function Location Type Range Range Setpoigt-MDH-RIA-108G-2 Radiation Indicate Noble Gas airborne Pnl.2 Victoreen 10-106 cp, Ratemeter/

radiation from HDHR Jump 908428 Alarm Cubical Filtration System +

Alarus for High-Red, Alert-Amber, and Fail-Green MDH-VE-1A Accelerometer

-MDH-P-1A bearing housing MDH-P-1A Vib ra-0 - 25 g 0 - 2500 av N/A Senser vertical radial vibration brg. hous-Metrics i

ing

1. 6022 MDH-VE-2A Accelerometer HDH-P-1A bearing housing MDU-P-1A Vib ra-0 - 25 g 0 - 2500 av N/A Sense r horizontal radial vibration brg. hous-Metrics ing

1. 6022 MDH-VE-1B Accelerometer MDH-P-1B bearing housing MDH-P-1B Vibra-0 - 25 g 0 - 2500 av N/A Senser vertical radial vibration brg. hous-Matrica ing

1. 6022 MDH-VE-2B Accelerome ter HDH-P-1B bearing housing MDH-P-1B Vib ra-0 - 25 g 0 - 2500 av N/A Senser horizontal radial vibration brg. hous-Metrics ing

1. 6022 MDH-VIAH-1 Annunciator Lights A) CHANNEL 1 - MDH-P-1A Adjacent Vib ralarm N/A N/A 2-3 time

& Velocity bearing vertical radial to PNL.1 Model No.

above Indication vibration " ALERT" LIGHT A66 + 3' VA 102-2 initial (Low Alarm-White Lt.)

AM + 6' level CHANNEL 1 - MDH-P-1A Adjacent Vib ralara N/A N/A 4-5 time bearirs housing vertical to PNL.1 Model No.

above radial vibration " SHUTDOWN" A66 + 3' VA 102-2 initial LIChr (High Alarm-Red Lt.)

AM + 6' level B) CHANNEL 2 - MDH-P-1 A Adjacent Vibralara N/A N/A 2-3 time bearing horizontal radial to PNL.1 Model No.

above vibration " ALERT" LIGHT A66 + 3' VA 102-2 initial (Low Alarm-White Lt.)

AM + 6 level

't 4

A l'

.l t

4 i

I

Page 52 TA.. 6 INSTRUMENTATION CONTROLS & ALARMS Input Output Setpoint Id7ntification Description Punction Location Type Range Range i

HDH-VIAH-1 Annunciator Lights CHANNEL 2 - MDH-P-1A Adjscent Vib ralara N/A N/A 4-5 times

& Velocity bearing housing horizontal to PNL.1 Mad 1 No.

above Indication radial vibration " SHUTDOWN" A66 + 3' VA iJ2-2 initJa1 LIGHT (High Alarc-Red Lt.)

AM + 6' level C) System Malfunction Light Adjacent Vibralare N/A N/A N/A (amber) to PNL.1 Model No.

A66 + 3' VA 102-2 AM + 6' D) CHANNEL 1 & 2 Velocity Adjacent Vibralara 0 - 2500 av 0.0.7 in/sec N/A i

meter to PNL1 Model No.

A66 + 3' VA 102-2 AM + 6' MDH-VIAH-2 Annunciator Lights A) CHANNEL 1 - MDH-P-1B Adjacent Vibralare N/A N/A 2-3 time:

L

& Velocity bearing housing vertical to PNL1 Model No.

above Indication radial vibtstion " ALERT" A66 + 3' VA 102-2 initial LIGHT (low / alarm-White AM + 8' level Lt.)

CHANNEL 1 - MDH-P-1B Adjacent Vibralarm N/A N/A 4-5 timer :

bearing housing vertical to PNL1 Model No.

above radial vibration " SHUT-A66 + 3' VA 102-2 initial DOWN" LIGHT (High Alarm-AM + 8' level RED LT.)

B) CHANNEL 2 - MDH-P-1B Adjacent Vibralara N/A N/A 2-3 t ime: '

bearing housing horizontal to PNL1 Model No.

above radial vibration " ALERT" A66 + 3' VA 102-2 initial i

LIGHT (low alarm-white AM + 8' level Itd CHANNEL 2 - NDH-P-1B Adj acent Vibralarm N/A N/A 4-5 time bearing housing horizontal to PNL1 Model No.

above axial vibration " SHUTDOWN" A i6 + 3' VA 102-2 initial LIGHT (High Alarm - Red AM + 8' level it.)

j 4

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P:ga 53

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TA 6

e INSTRUMENTATION CONTROLS & ALARMS Input Output Id:ntification Description Function Location Type Range Range Setpoint MDH-VIAH-2 Annunciator Lights C) System Halfunction Light Adj acent Vib ralara N/A N/A N/A

& Velocity (amber) to PNL.1 Model No.

Indication A66 + 3' VA 102-2 AM + 8' D) CHANNEL 1 & 2 Velocity Adjacent Vibralarm 0 - 2500 mv 0.0.7 in/sec N/A i

Meter to PNL1 Model No.

A66 + 3' VA 102-2 l

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' MDH-VAH-1 Annunicator High Vibration of MDH-P-1 A1 Pnl.2 N/A N/A kan MDii-i Light or IB bearing housing or VI AH-l &2' system malfunction i

! MDH-DPT-3 7 D/P Transmitter Measure Differential Piping Foxboro 0-120 paid 10-50 ma N/A Pressure across MDH-F-1 A66' + 12' N-E l lDM-AF + 8' HAB2 1

MDH-DPS-37 D/P Pressure High D/P Alarm Signal Pnl.1 Foxboro 10-50 ma N/A

_ma Switch across MDH-F-1 to MDH-DPAH-63U-BT-l 37 OHER

, MDH-DPAH Annunicater Alarm High D/P across Pnl.1 &

G.L Type N/A N/A 65 psid

I&2 Ligh t/P

n MDil-F-1 (Amber Lt.)

Pnl.2 CR2940 above initial I

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clean d/4

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I seal block I

l MDH-FI-7 Flowme te r Indicate Demineralized Piping Matheson 0.3-3.0 gpm 0.3-3.0 gpm 1 to 1.5 l

Water Flow to MDH-P-1B TrM-1100 gpm Seal Block

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Pzgo 54 TABLE 6 INSTRUMENTATION CONTROLS & ALARMS Input Output Idrntification Description Function Location Type RanRe Range Setpoint HDH-TVC-1 T.V. Camera Monitor MDH-P-1A & IB pump F.H. Bldg. Diamond Elec. N/A N/A N/A cubicles El. 280'-6" ST-11 Camera A66 + 18' PT-1050-L Pan /

AF + 3' Tilt 30-150, MM Zoom Lena MDH-TVC-2 T.V. Camera Monitor MDH-HX-1 A & IB F.H. Bldg. Diamond Elec. N/A N/A N/A heat exchange room El. 280'-6" ST-11 Camera A67 & AF FT-1050-L Pan /

Tilt,30-150, g

HM Zoom Lens MDH-RACK-TV1 T.V. Monito r Monitor for MDH-TVC-1 Cont. Bldg. Con-Rack N/A N/A N/A

& Controls and controls for Pan-El. 305'-0" 14" B & W Tilt mechanism with C47 + 0' Receivers and zoom / focus controls CC + 9' Control Modules MDH-RACK-TV2 T.V. Monitor Monitor for MDH-TVC-2 Cont. Bldg. Con-Rack N/A N/A N/A

& Controls and controls for Pan-El. 305'-0" 14" B & W Tilt mechanism with C47 + 0' Receivers and zoom / focus controls CC + 9' Control Modules d',

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