ML20151U487
| ML20151U487 | |
| Person / Time | |
|---|---|
| Site: | 05200003 |
| Issue date: | 09/02/1998 |
| From: | WESTINGHOUSE ELECTRIC COMPANY, DIV OF CBS CORP. |
| To: | |
| Shared Package | |
| ML20151U449 | List: |
| References | |
| WCAP-13957, WCAP-13957-01, WCAP-13957-1, NUDOCS 9809110020 | |
| Download: ML20151U487 (109) | |
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f WCAP-13957 h+ e l l
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- l AP600 REACTOR COOLANT SYSTEM j MASS INVENTORY
- FUNCTION BASED l TASK ANALYSIS j i
- I' i
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- !I i
j Electnc Cor;cranon: it is submitted in conhdence and is to be used soley for the purpose for whd it is lumished and retumed upon request. This document and such infn-anon is not to be reproduced. transmitted. disclosed or used otherwee in whole or in part without pnor wncan authonzatson of Wesenghoust t- ac Corporanon, Energy Systems Ilusiness Unrt, subject to the legende contained hereof. j WESTINGHOUSE CLASS 3 (NON PROPRIETARY) l l
g ARC FOAKE PROGRAM ARC LIMITED RIGHTS STATEMENT This propnetary data. fumished under Subcontract Number ARC-93 3 SC401 wth ARC may be dupicated and used by the govemment and ,
ARC. subject to the bmitations of Arnde H 17 F. of that subcontract, with the express limitations that the propnetary data may not be disdosed t outside the govemment or ARC, or ARC's Class 1 & 3 members or EPRI or be used for purposes of manufacture without pnor permission of I the Subcontractor, except that further disclosure or use may be made solely for the fonowing purposes: l This proonetary data may be disdosed to other than commercial compentors of Subcontractor for evaluaton purposes of this subcontract uncer l the restnction that the propnetary data be retained in conAdence and not be further disdosed, and subloct to the terms of a non disclosure ,
agreement between the Subcontractor and that organization, exduding DOE and its contractors. g E (C) WESTINGHOUSE ELECTRIC CORPORATION 19_94 A icense is reserved to the U.S. Govemment unoer contrar,t DE-FC02 NE34267 and subcontract ARC-93 3-SC 001.
3 ARC CONTRACT DELIVERABLES (DELIVERED DATA)
Subject to spectned exceptions. daciosure of this data is restncted under ARC Subcontract ARC-93-3 SC4vi. !
Westinghouse Electnc Corporation Energy Systerns Business Unit l
Advance Technology Business Area P.O. Box 355 Pittsburgh, Pennsylvania 15230 1
@ 1994 Westinghouse Electric Corporation All Rights Reserved !
J
e .
AP600 DOCUMENT COVER SHEET Form 58202F(9/93)[WP xxxx] AP600 CENTRAL FILE USE ONLY; RFS#. RFS ITEM e. l 0058 FRM l
\P600 DOCUMENT NO. fEVISION NO. PAGF.S ATTACHED ASSIGNED TO OCS M3C-001
B 105 ALTERNATE DOCUMENT NUMBER: WCAP-13957 ATTACHMENTS DESIGN AGENT ORGANIZATION: Westinghouse Electric PROJECT: AP600 WORK BREAKDOWN #: JOCS6 TITLE: AP600 REACTOR COOLANT SYSTEM MASS INVENTORY: FUNCTION BASED TASK ANALYSIS CALCULATION / ANALYSIS
REFERENCE:
DCP #/REV. INCORPORATED:
ELECTRONIC FILENAME: l APPLICATION: Word Perfect 5.1 RCSMASS.MD l (Sun W/S) l l j e I
I ry to s 9 ouse Electne Corporaton; it is submitted in confidence and is to be used solely for the purpose for which at is fumished and retumed upon request. This cbcument and such information is not to be reproduced, transmitted, disclosed or used otherwise in whole or in part without pnor wntten authonzation of Wesunghouse Electnc Corporanon, Energy Systems Business Unit, subject to the legends contained hereof, O WESTINGHOUSE CLASS 3 (NON PROPRIETARY)
O DOE DESIGN CERTIFICATION PROGRAM GOVERNMENT LIMITED RIGHTS STATEMENT [See reverse side of th (C) WESTINGHOUSE ELECTRIC CORPORATION 1994 A heense is reserved to the U.S. Govemment under contract DE ACO3 90SF18495.
DOE CONTRACT DELIVERABLES (DELIVERED DATA)
Subject to specified excepcons, disclosure of this data is restncted unti September 30,1995 or Design Cerufcation under DOE contract DE ACO3 90SF18495, whichever is later.
EPRI CONFIDENTIAL / OBLIGATION NOTICES: NOTICE: 1 2 30 4 sO CATEGORY: A B C D E F
@ ARC FOAKE PROGRAM ARC LIMITED RIGHTS STATEMENT [See reverse side of this form)
@ (C) WESTINGHOUSE ELECTRIC CORPORATION 1994 A license is reserved to the U.S. Govemment under contract DE FCO2-NE34267 and subcontract ARC 93 3 SC 001, a ARC CONTRACT DELIVERABLES (DELIVERED DATA)
Subject to specified excepoons, disclosure of this data is restncted under ARC Subcontract ARC 93 3 SC 001.
ORIGINATOR SIGNATURE /DAT J. HAENTJENS M f3, fffy AP600 RESPONSIBLE MANAGER SIGNAT APPROVAL DATE IU
,b / "f 4-
- Approval of the responsible manager signifies that document is complete, all required reviews are complete, electronic tile is attached and document is r; leased for use.
s o l
Form 58202F(9/93)
LIMITED RIGHTS STATEMENTS DOE GOVERNMENT UMfTED RIGHTS STATEMENT (A) These data are submitted with Irnited rights under government contract No. DE-ACO3 90SF18495. These data may be cod to and used by the govemment with the express hmitanon that they will not, without wntten permission of the cor' tractor, be u for purposes of manufacturer nor disclosed outside the govemment; except that .he govemment may disclose these data outside the govemment for the following purposes, it any, provx$ed that the govemment makes such disclosure subject to prohibinon against further use and disciosure (1) TNs
- Proprietary Data" may be disclosed for evaluaton purposes under the restrictons above.
(11) The
- Proprietary Data
- may be disdosed to the Electne Power Research insttute (EPRI), electnc uthty representanves and their drect consultants, exduding drect commercial compentors, and the DOE Nanonal Laboratones under the proh binons and restncnons above.
(B) TNs notce sha# be marked on any reproduccon of these data, in whole or in part.
ARC UMITED RIGHTS STATEMENT:
This ARC,propnetary data, fumished under Subcontract Number ARC-93 3 SC-001 with ARC may be duphcated and used by the government and subject to the hmitabons of Artde H 17.F. of that subcontract, with the express hmitatons that the propnetary data may not be disdosed outstde the govemment or ARC, or ARC's Class 1 & 3 members or EPRI or be used for purposes of manufacture without pnor permission of the Subcontractor, except that further disclosure or use may be made solely for the following purposes:
TNs propnetary data may be disclosed to other than commercial compentors of Subcontractor for evaluanon purposes of this subcontract under the restncton that the propnetary data be retained in conhdence and not be further disclosed, and subject to the terms of a non disclosure agreement between the Subcontractor and that organization, exduding DOE and its contractors.
DEFINITIONS DELWERED DATA - Consists of documents (e.g. specifications, drawings, reports) which are generated under the DOE or ARC Contracts.
EPRI CONFIDENTIALITY / OBLIGATION NOTICES NOTICE 1: The data in this document is subject to no confidentality obliganons.
NOTICE 2: The data in this documentis propnetary and con 6denhal to Wesanghouse Electne Corporation and/orits Contractors. It is forwarded to recipeent under an obligation of Confidence and Trust for hmited purposes only. Any use, disclosure to unauthorned persons, or copying of this document or parts thereof is proNbited except as agreed to in advance by the Electne Power Research insttute (EPRI) and Wesunghouse Electne Corporanon. Recipient of this data has a duty to inquire of EPRI and/or Wesunghouse as to the uses of the information contained herein that are permrtted.
NOTICE 3: The data in this documentis propnetary and confidenta! to Wesonghouse Electne Corporation and/orits Contractors. Itis forwarded to recipient under an obligabon of Confidence and Trust for use only in evaluation tasks specifically authonzed by the Electnc Power Research Insatues (EPRI) Any use, dsclosure to unauthonzed persons, or copying tNs docurnent or parts thereof is prohibited except as agreed to in
. advance by EPRI and Westinghouse Electnc Corporabon. Recipient of tNs data has a duty to inquire of EPRI and/or Westnghouse as to the uses of the informaton contained herein that are permitted. This document and any copies or excerpts thereof that may have been generated are to be retumed to Westinghouse, directly or through EPRI, when requested to do so.
NOTICE 4: The data in this document is propnetary and cbnfidential to Wesunghouse Electric Corporanon and/or its Contractors. It i revealed in confidence and trust only to Emplo Any use, disclosure to unauthonzed persons,yees of EPRI and to certain contractors of EPRI for hmited evaluanon tasks authonzed by or copying of this document or parts thereof is proNbited. This Document and any copies or excerpts thereof that may have been generated are to be retumed to Wesunghouse, directly or through EPRI, when requested to do so.
NOTICE 5: The data in this document is propnetary and confidental to Wesanghouse Electic Corporanon and/or its Contractors. Acx:ess to tNs data is given m Confidence and Trust only at Westinghouse tacihees for linuted evaluanon tasks assigned by EPRt. Any use, disdosure to unauthonzad persons, or copying of this document or parts thereof is proNbited. Neither this document nor any excerpts therefrom are to be removed from Westnghouse tacihnes.
EPRI CONFIDENTIALITY / OBLIGATION CATEGORIES CATEGORY "A"-(See Delivered Data) Consists of CONTRACTOR Foreground Data that is conta:ned in an issued reported.
CATEGORY "B"- (See Dehvored Data) Consists of CONTRACTOR Foreground Data that is not contained in an issued report, except for computer programs.
CATEGORY "C"- Consists of CONTRACTOR Background Data except for computer programs.
CATEGORY "D"- Consists of computer programs developed in the course of performing the Work.
CATEGORY "E"- Consists of computer programs developed pnor to the Effectve Date or after the Effecnve Date but outside the scope of the Work CATEGORY "F"- Consists of administranve plans and administranve reports.
l AP600 RCS Mass Inventory - Function-Based Task Analysis i
\
FOR INFORMATION ONLY 4
TABLE OF CONTENTS i
i 1. INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .... . . . . Page - 3 i 2. TERMINOLOGY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page - 4
- 3. SCOPE........................... ... ...... . . . . . . . . . . . Page - 8 i
! 4 FUNCTION COMMODITY . . . . . . . . . . . . . . . . . ................. Page - 10
. 5. FU14CTION PARAMETERS . . . . . . . . . . . . . . . . . .
- ............... Page - 11 I
6.
FUNCTION CONTROL VOLUMES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page - 11 j 7. FUNCTION GOALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page - 14 1
2 8.
OTHER FUNCTIONS / GOALS AFFECTED BY THIS FUNCTION . . . . . . Page - 15 i
- 9. GOAL MONITORING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page - 16 4
j
, 10. FUNCTION DECOMPOSITION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page - 19 4
j
. 11. FUNCTION MEANS ANALYSIS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page - 22
]
APP ICES................................................ Page - 26 e
A Mass Flow IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page -
i i
J B. RNS Mass Flow IN-OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page - 43 l
C. IRWST/ Sump Forced Mass Flow IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page - 51 D. efueling Cavity Filling and Draining . . . . . . . . . Page - 58 4
, E. CMT Mass F1ow lN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page - 62 i
F. Accumulators Mass Flow IN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page - 68 l G. IRWST/ Sump Natural Mass Flow IN . . . . . . . . . . . . . . . . . . . . ........ Page - 72 H. VS Letdown Flow OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page - 75
- 1. eactor Vessel Head Vent .................. .............. .. Page - 8 AP600 C5-M3CM1 Rev B WP Maner Doc & Tune : RCSMASSMD January 13.1994 !$:26 uuo a: u xo-93 a 1 Rev B Page - 1
f
,4 Q R AP600 RCS Mass Inventory - Function-Based Task An ysis FOR INFORMATION ONLY 1
l J. PRHR Vent .............................................. Page - 86 i
K. 1st, 2nd and 3rd Stage ADS Mass Flow OUT . . . . . . . . . . . . . . . . . . . . . . . Page - 89 j L. 4th Stage ADS Mass Flow OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page - 94 i
j i. PRZ Safety Valves Mass Flow OUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page
- . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Pag e - 100 i
LIST OF AP600 SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page - 100
{ LIST OF ACRONYMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page - 102 LIST OF REFERENCE DOCUMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page - 103 5
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9 .
f AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY AP600 RCS MASS INVENTORY Function-Based Task Analysis t
, 1. INTRODUCTION i
This document is issued as an example of a function-based task analysis and it contains proprietary information. This example contains specific data that represents the current status of the design documents which are used as references. This document is stamped "FOR INFORMATION ONLY", because its purpose, for the present time, is to be used as an example.
- This function is developed amund the goal-means structure, described in chapter 18 of the SSAR and illustrated in figures 18.9.1-3. The means are developed based on, but not limited to, design t
documents and discussions with system designers. This document will progress as the design documents and the process maturity of interfacing with M-MIS evolves. Therefore, it is understood that this document follows an iterative process and becomes complete only when the system design is fmal.
SSAR figure 18.6-9 identiiles the " Top Four Levels of the Normal Power Operation for a Westinghouse PWR". The present function is one of the " LEVEL 4" functions.
e A complete description of the " FUNCTION-BASED TASK ANALYSIS" and the M-MIS design
- i. process, can be found in the SSAR chapter 18.
The purpose of this document is to provide support for M-MIS design tasks, and to communicate M-MIS intentions and/or needs in this area to AP600 systems designers. Developing this document ensures a homogenous and a consistent approach to the M-MIS design. SSAR figures
- 18.8.2-1 and 2 locate the " Function-Based Task Analysis"in the design process.
Reference document identification is incorporated in the text with the extracted data. The basic
, idea behind having the data extraction closely associated to the source reference, is to give a fast and reliable way to return to the source, and to verify if the design idea was captured with accuracy. This will also help to track the data origin and to verify any impact due to source a document update.
i By accuracy, one could mean to copy straight away, but the data extractions have to be kept in their original context (plant state, system state ...). By accuracy, it is also meant to insert these extractions in the right perspective of the goal-means functional structure. For the two previous reasons, the extractions were intentionally altered. Another intentional alteration was made, when the data extracts contained information not relevant to the function. However the intent is to avoid narrowing the designer's ideas and to hopefully enlarge them in the present function.
AP6000: OCS M3C.001 Rev a WP Master Doc & Time : RCSMASSMD January 13.199415:26 uuo g: uuD ou01 Rav a Page - 3
o .
l l
AP RCS Mass Inventory - uncuon- ase ask Analysis FOR INFORMATION ONLY j l Texts found in " italics" represent any one of the following:
- 1. Questions to ask to the designer.
l They are noted as "XYZ-Q", where XYZ stands generally for the system identifier.
- 2. Answer from the designer.
i
- They are noted as "XYZ-A". At the final stage, all the system questions and answers I
would be removed and replaced by design document extractions when the background of the question and the answer are adopted and appropriately documented.
- . 3. Memorandum, i
They are noted as " Memo" and are used to remember why a data was incorporated or to remember an idea, ....
A complete li:,t of all " Memo", "XYZ-Q" and "XYZ-A" and their respective locations in this document are found in the index.
References to the SSAR are used to help locate background material and understand the philosophy and the context of this document. In other words, the SSAR reference is not use'd as l a design reference.
Any conflict between this document and project documentation should be reported to the j author for resolution.
- 2. TERMINOLOGY The terminology is borrowed from the MELCO P.I.S.C. references and expanded to the following:
Function A collection of plant means (processes) which are controlled in a coordinated manner to impact dual plant parameter or system / component objective in support of other plant means. I l
l AP60v R: OCS-M3CM1 Rn B WP Maner Doc & Time : RCSMASSMD Janwy 13.199413:26 Muo a: MMD-osal Rn s Page - 4
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- 4 AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY mm There are three parts to defining a specific function:
Parameter: The measure of function satisfaction. u Control Volume: That portion of the plant where the function applies.
Commodity: Defines what, within the control volume, is manipulated by the means for this function, i.e. water mass or energy.
Means (Process)
The manipulation of the commodity to either conven the commodity from one form to another, or to transport the commodity fmm one control volume to another.
Means Element A piece of a means having a specific role in the means.
Source A tank or other type of storage node that feeds the means or provides a soun:e for increasing the commodity. '
Transport The set of entities that am provided and are necessary to carry or move a plant commodity. These entities are usually a transport path and a motive force.
Injection Point
[ A point where the commodity is injected INTO the controlled volume.
Ejection Point A point where the commodity is extracted OUT of the controlled volume.
Potential Secondary Injection Points A segregation in " Injection Points" and " Potential Secondary Injection Points" is made j to help the M-MIS designer and the operator identify potential flow derivation.
I P
, AP600 #: OCS M3C.001 Rev B WP Ma,ner Doc & Tune : RCSMASSMD January 13,199415:26 MMD #: MMD-93 001 Rev B Page - 6
1 i
.i'AP600 RCS Mass Inventory - Function-Based Task Analysis
)
FOR INFORMATION ONLY '
GM Sink il A node where the commodity that is extracted OUT of the controlled volume is transported for funher processing or for storage.
I -
Potential Secondary Sinks Similar to " Potential Secondary Injection Points" but for sinks.
3 l Refer to figure 2-1 for an illustration of these means element definitions.
I i Active Means 3 A means composed of at least one element requiring additional support for continued operation ,
such as electric power or compressed air, in order to be operational. It has to be noted that the word " Active" in this context has a diffemnt meaning than for mechanical components as defined by Regulatory Guide 1.48 (May 1973): " Active Pumps and Valves: Components that must 4
perform a mechanical motion during the course of accomplishing a system safety function".
Passive Means
- A means composed of elements that do not require additional support for cont
- aued operadon .
' The implication is that the means is operational when the elements (transpon) are in their aligned position. Passive means includes those that are self actuated (totally passive) and those that require a one-time actuation (semi-passive) and do not require continuous support once actuated.
Support This relationship ties functions to other functions. Specifically, it ties a means element in one function to another external function. The existence of a support identifies dat the means element requires some level of performance from the external function in order to perform its role for its process.
Predicate The relationship between the means element and the external function is quantified by an algebraic or logical expression associated with the support link and is known as the predicate .
In this way, setpoints and critical algorithms are captured in the task analysis, j E I I AP600 #: OCS-u]CD01 Rna WP uaner Doc & Time : RCSMASSMo Janary 13 199413:26 uuo a: uuo.essol Raa Page - 7
- AP600 RCS Mass Inventory - Function-Based Task Analysis
- . FOR INFORMATION ONLY Side-Effect i
This relationship is used to identify cases whem plant equipment has been designed to perform
- in the means of more than one function, i.e., the equipment was intended or can be used for more than one purpose. A side-effect will appear as a link between a means in one function and a means in another function. In essence, the link states that when one means is manipulated, the
, other is also manipulated due to the fact that they are implemented with the same plant 4
equipment. An example of a side-effect is the reactor makeup that will appear in the functional structure in both the "RCS Water Mass Inventory" function and the "RCS Boron Control" function.
\
. COPE !
i i
In table 3-1, the 11 questions defined in the SSAR chapter 18 are listed as " ISSUE" with their I related " ANSWER CONTENTS". For each " ISSUE" and " ANSWER CONTENTS" an i
" ANSWER LOCATION" is denned with an indication of whether the answer is located in the l
, present document (FBTA indication in column " DOC LOC"). The 11 issues are listed in a !
sequence that follow the order of the operator mental process model. In rearranging the answer contents to be present in the FBTA, from general to detail answers, we come up with the following main subdivisions of the FBTA document:
4 Section 1. Introduction
{ This section describes the context in which the FBTA is developed.
l 1
l Section 2. Terminology
! This section provides the definition of specific terms used in this document. !
!, l
! Section 3. Scope i Section 4. Function Commodity This section defines the function commodity.
Section 5. Function Parameters
- 1 This section defines the function parameters. I Section 6. Function Control Volumes This section describes the different control volumes and identifies the conditions validating a specific control volume.
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. . x AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY Section 7. Function Goals Tids section describes the function goals for each control volume.
Section 8. Other Functions / Goals Affected by this Function This section develop the interfaces between the present function and the affected external functions. He "Means Side-Effects" are synthesized here.
Section 9. Goal Monitoring This section details the " Function Parameters" and their " Design Envelope and Nominal Conditions" that identify the conditions for goal satisfaction. The " Design Envelope and Nominal Conditions" paragraph contains or identifies the " Domain Definition (target, acceptable, unacceptable....)" and the setpoints, zones and graphs.
The instruments are described with their " Valid Operation Conditions" and " Analytical Instrumentation Checking". The " Valid Operation Conditions" define the conditions that produce meaningful readings. He " Analytical Instrumentation Checking" identifies (if any) the readings combination to verify a unique reading.
Section 10. Function Decomposition '
This section describes the means for the respective function and hov' the means are sorted and aggregated.
Section 11. Function Means Analysis This section identifies expected reliability (IE, seismic, aircraft impact, etc...), describes designed and/or preferred sequence or hierarchy between means with their specific advantages and disadvantages.
Appendices. Library of Means Descriptions structure of each means description is presented in table 3-2 and is relatively self explaining. The following provides some additional information on the structure:
The "Means Description" collects and organizes design bases information in the paragraph "Means Design Bases" and within each respective element description.
However, the design bases ofinterest are limited to those that are related to operations or to help memorize a configuration. Layout, maintenance, mechanical, etc., design s are not included, unless they aid the M-MIS designer or, in turn, the operator.
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- ~. . - - . - .. . . - - _ . _ _ . . . - _
AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY
" Design Envelope and Nominal Conditions" defines the design and the nominal values of the means under consideration and for a specific function.
" Analytical Instrumentation Checking" has the same meaning as for section 9.
^
The "Means Essential Data" describes what reading (s) should be present in high level l
- representation of the means. When the means has several functions, the means essential data are segregated versus the function. This paragraph shows the potential side-effects l i
between the identified functions, l 1
~
The " Prerequisite Means Conditions" of the "FBTA ISSUES" table are identified as
, " Operation Conditions" and " Support Conditions". They identify i.e when a source is a true source and if the source can act as a source. A tank has to be filled with water to
, be a source and the water has to be liquid and not ice to be able to act as a source.
- 1 l Finally, the "Means Alignments" identifies the means configurations and eqmpment l'
i status.
The means descriptions are developed with the idea of creating a library of these means descriptions. The advantage to having each means description available in a library becomes apparent when a given means is used in more than one function. Therefore, the means descriptions are multifunction oriented and reflect any design intent of having one equipnient or means fulfilling more than one function. The side-effects and the advantages and ;
1 disadvantages are also more straightforward.
j j ONS:
l The context is limited to the function and the function's means.
l Detail data will be contained in the AP600 Data Base and therefore, this document will be used with the AP600 database which will contain the design details. Example of such !
details are: component interlock diagram number, the power source, instrument range !
l precision and more. Therefore, and for data maintainability, this specific information will not- '
! be duplicated in this document except where it adds clarity. Even if design details would be incorporated, they should never take precedence over the AP600 database.
- 4. FUNCTION COMMODITY ,
The selected commodity is RCS water mass. '
While the function commodity, parameter, and control volume are described separately, they are closely coupled to each other. This means that the selection of one directly influences the other two. Usually, an iterative process is involved to define the best selection for the function, of the 1
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, AP600 RCS Mass Inventory - Function-Based Task Analysis 4
FOR INFORMATION ONLY triplet " parameter, commodity and control volume". The goal-means structure is, in its turn influenced by the triplet selection.
i Merely using the coolant as the commodity entangles the issues about water, boron, and other components of primary water chemistry that can be controlled separately. Because these other
'als can be controlled separately, they will be represented by separate functions.
1 The entanglement is highlighted in the sections " Function Goals" and "Other Functions / Goals Affected by this Function".
g FUNCTION PARAMETERS j The selected parameters are RCS water levels in the PRZ and in the RV associated to the
- density.
! GP l 6. FUNCTION CONTROL VOLUMES
< P The control volume selection is not unique but corresponds to logical modeling rules about the
- parameters of interest. If the control volume selection is too small or divided (for example
- RV
! and PRZ), the function parameter would be incompletely covered, are if too large, it would
- include means that could lose their visibility and identity. '
! More than one contml volume can be considered if the control volume boundary can change. The l transition from one control volume to an other is not always smooth and could be considered as a mathematical function discontinuity. 'Ihat discontinuity could be seen by an operator as an l irreversibility without control room external assistance i.e. the RVH removal is done outside the
) control room with external operator assistance.
Three different contml volumes are considered:
The first control volume (See figure 6-1) is the basic RCS volume which encompasses:
RV + HLs + SGs + RCPs +CLs + PRZ + Surge Line + PRZ Spray line from CL.
The conditions to consider this volume are:
All plant conditions for which the RCS pressure boundary is maintained. (More later).
The second control volume (See figure 6-2) is the basic RCS volume eventually altered by the removal of the RVH and/or the insertion of SG dams with the r.ddition of the RV cavity. This control volume is specifically considered for maintenance and refueling operations.
I I Als o 9: OCS-M3C-001 Rev B WP uaner Doc A Time :RCSMASSMD January 13,199413:26 uuo a: u u o.os a l Rev a Page - 11
J 4 AP600 RCS Mass Inventory - Function Based Task Analysis 4
FOR INFORMATION ONLY Fig 61: Fitst Control Volume
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AP600 RCS Mass Inventory - Function Based Task Analysis FOR INFORMATION ONLY l
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i : i l
'600 * ' ass ventory - Function-Base. as n i y is j
FOR INFORMATION ONLY RCS-M3-001-0-p20: Specia! SG nozzle dams are designed to perform SG service and refueling concurrently.
OPERATOR-Q: How are their presence controlled and when is it Important to know where they are ? Any leak detection ? Any local or remote alarm ?
The conditions to consider this volume are:
RVH removal, etc... Later.
i ,
The third volume is the first control volume plus the secondary r,sde of the SG(s). In this case, we have a SGTR and an interference with SG water mass inventory. He figure 6-3 will be provided (Later).
The fourth control volume is the basic RCS volume with the addition of the containment sump (s). In this case the basic RCS control volume lost its boundary integrity. He figure 6-4 will be provided (Later).
1 The conditions to consider this volume are:
1 i -
Containment radiation increase, Containment pressure increase, '
Containment sump level increase, j -
RCS pressure decrease, etc... Later.
4 1 7. F CTION GOALS l The very basic goals of the RCS Water Mass Inventory function is to provide:
i -
Core minimum water coverage, Coolant volume change compensation, RCS filling, draining.
l
! arst Control Volume 1
j The RCS water mass inventory function is, in a certain way, a support function to the RCS j pressure control, the RCS temperature control and the RCS boron concentration control functions.
- Without proper water mass inventory, none of the three above functions can perform their role, i
~ Furthermore, the RCS water mass, RCS pressure and RCS temperature are closely interrelated by thermodynamic laws. This close relation is very present in the PRZ water level control which determines the PRZ water level as a function of the RCS T3 vo which in turn is dependent on the power level. Therefore, the PRZ water level control provides RCS coolant volume change 1
com xnsation.
l f P
AP6000: OCS.u]CM1 Rev B WP ustter Doc & Time :RCSuASSMD Janwy 13.199413:26 uuDa: u u D-93 a 1 Rev B Page - 14
n % e AP600 RCS Mass Inventory - Funcdon-Based Task Analysis FOR INFORMATION ONLY j
The RCS pressure has little effect on the RCS water volume because of the low compressibility of the liquid water. However, the RCS pmssure has an influence on the water level reading by precluding vc. ids formation. This justify the subcooling margin monitoring.
Second Control Volume When the RV is open, the RCS pressure is not an important parameter anymore and the focus is on com minimum water coverage, RCS temperature control and biological shielding. In this function configuration, the RV water level is the primary parameter.
Third Control Volume When the RCS boundary lost its integrity, we can consider three cases in decreasing order of severity:
the PRZ water level control goals can be satisfied, the PRZ water level control goals can not be satisfied but the RV water level can be satisfied, the RV water level can not be satisfied.
. OTHER FUNCTIONS / GOALS AFFECTED BY THIS FUNCTION As explamed in the previous section, the RCS water Mass Inventory function affects the following functions:
Fuel and clad temperature control.
RCS boron concentration control.
Reactivity contml.
RCS pressure control RCS temperature control.
Biological shielding (refueling only).
RCS water quality and chemistry. '
The following containment functions are affected when the " Passive OUT Means" are workin Containment pressure and temperature control.
Barrier against fission product release.
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l 1
AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY gh -
- 9. GOAL MONITORING l l
As defined previously, the selected parameters are RCS water levels in the PRZ and in the RV and density.
l l 9.1. PRZ Water Level 9.1.1. Parameter Design Bases l To operate the secondary plant at optimum conditions, the RCS must be operated at elevated
- temperatures. To prevent bulk boiling at these temperatures, the RCS is operated at a pressure well above that corresponding to the saturation point for a given operating temperature. The PRZ, i where a steam-liquid interface is maintained in saturated equilibrium, provides a point of pressure control for the entire system. The PRZ also accommodates changes in the RCS volume and limits changes in system pressure due to reactor coolant loop temperature variations under all modes 4
of operation.
- 9.1.2. Parameter Design Envelope and Nominal Conditions i
Primary graphs:
Program PRZ Level versus T 4vo. Later.
Progmmmed T4vo versus Power (%). Later.
PRZ water level setpoints. Later.
Memo: " water solid" and " steam bubble" cooldown (RCS-M!-001-0-plS). In this case there is an operator choice and demand which will impact the goal sathfaction.
e Additional curves to monitor the working point against other function goal constraints:
1 RCS Pressure versus RCS Temperature for: (Later)
. RCP NPSH requirements curve,
. Maximum RNS loop operating pressure curve, ,
- . SG differential pressure limit curve,
. Criticality limit curve, ,
} . Heatup and cooldown rates curves.
4 9.13. Instruments (Later)
RCS-LT195:
Design Bases I P AN00 0: oCs-u]C.001 RnB WP Maner Doc & Time : RCSMASSMD Janwy 13,199413:26 uuoi: u u o-93 a 1 Ras Page - 16
i
% s 4
i RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY
&M Valid Operating Conditions
, RCS-LT196:
l
- Design Bases i Valid Operating Conditions RCS-LT197
{ Design Bases l Valid Operating Conditions I
- RCS LT198
i i Design Bases l Valid Operating Conditions i
l 9.1.4. Automation
~
J W drawing SD63525 sh 23 Rev 1. AP600 Functional Diagrams - PRZ Pressure and j Level Control.
i 9.1.5. Alarms Later.
9.2. RV Water Level 9.2.1. Parameter Design Bases Later.
9.2.2. Parameter Design Envelope and Nominal Conditions Later.
9.2.3. Instruments RCS LT160: RCS Hot Leg 2 (HL2) Level 4N AN00 0: OCS-u]C M I Rev B WP Mwer Doc & Time : RCSMASSMD January 13.199415:26 uuD 0: Muo-osal Rev s Page - 17
i
' AP600 RCS Mass Inventory - Function-Based Task Analysis i l y FOR INFORMATION ONLY p 4
Design Bases Nanow rance level in HL2 for mid-loop opemtion.
4 RCS-M3-001-0-p47: Narrow range level channels (LT160, LT170) are provided to
- monitor reactor coolant level in each of the hot legs during mid-loop operation.
Valid Operating Conditions 6
- . Required subcooling margin. Later.
i
} RCS-LT170: RCS Hot Leg 1 (HL1) Level l l Design Bases 4
Narrow range level in HL1 for mid-loop operation. l RCS M3-001-0-p47: Narrow range level channels are provided to monitor reactor
- coolant level in each of the hot legs during mid-loop operation.
RCS-M6-001-6: No'e 17: 1.evel instmment provided to monitor RCS water level during mid-loop operation following shutdown. Locate one tap at bottom of hot leg.
j For channel LT160, this should be upstream of RNS connection. Locate other tap on the top of the hot leg as close to the SG as possible. Tap at SG to be high-point i of tubing run.
Valid Operating Conditions Later.
RCS LT199: PRZ Wide Range Level ,
Design Bases
. Cold calibrated.
allows continuous monitoring of reactor coolant level down to below the mid-loop operation range during an RCS drain down operation.
. RCS-M3-001-0-p47: The bottom tap of one of the PRZ level channels (the " cold-calibrated" channel) must be connected to the bottom of the hot leg to which the PRZ is connected. This allows continuous monitoring of the reactor coolant level M
AP600 c: OCS-M3C-001 RnB WP Master Doc & Time : RCSMASSMD Janwy 13,199415:26 lK MMD c: MMD-93M1 RnB ' Page - ;
AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY IO down to below the mid-loop operating ange during an RCS drain down operation.
Valid Operating Conditions Later. l 9.2.4. Automation I
Later.
i 9.2.5. Alarms (Later) l RNS-M34)01-0-p14: Alarms are provided to alert the operator when the RCS level is approaching a low level. Furthermore, the isolation valves in the line used to drain the RCS are interlocked to close on a low RCS level during shutdown ,
operations.
I 9.3. RCS Water Density (tater) 93.1. Parameter Design Bases s
93.2. Parameter Design Envelope and Nominal Conditions 933. Instruments XYZ Design Bases Valid Operating Conditions Later.
I D. FUNCTION DECOMPOSITION function is decomposed (see figure 10-1) into two sets of means: The means to get water ty INTO and the means to get water OUT OF the control volume. For each set, an additional WD I
AP600 #: OCS-u]CMI Rn B WP Maner Doc & Time : RCSMASSMD January J3, J99413:26 uuD a: MMD-osal an B Page - 19
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AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY segregation is based on ACTIVE means versus PASSIVE means.
For means having the same source (or sink) and the same injection (or ejection) point, but different sets of aligned components, it seems easier to split the means in two or more. One with i
one set of components and a second with the other combination. This will simplify the process design bases and component descriptions. The split is obvious, if for one configuration the means is considered " ACTIVE" and for the other it is considered " PASSIVE" like "IRWST Forced Mass Flow IN" versus " Natural Injection" for "IRWST Water Mass Flow IN".
As shown in the following table, some IN and OUT means are condensed and are described as IN-OUT ("RNS Mass Flow IN-OUT") means. Some other means are combined as means " Leaks" a
with their normal means (" Reactor Head Vent" with " Reactor Head Vent Leak"). This makes the interactions clear and the description more concise.
MEANS MEANS DESCRIPTION (APPENDIX)
CVS Makeup Mass Flow IN CVS Mass Flow IN CVS Aux Spray Mass Flow IN CVS for RCP Motor Can Mass Flow IN Later RNS Mass Flow IN RNS Mass Flow IN-OUT -
RNS Mass Flow OUT IRWST Forced Mass Flow IN IRWST/ Sump Forced Mass Flow IN Containment Sump Forced Mass Flow IN Refueling Cavity Filling Refueling Cavity Filling and Draining Refueling Cavity Draining CMTs Mass Flow IN CMTs Mass Flow IN Accumulators Mass Flow IN Accumulators Mass Flow IN IRWST Natural Mass Flow IN IRWST/ Sump Natural Mass Flow IN Containment Sump Natural Mass Flow IN CVS Letdown Mass Flow OUT CVS Letdown Mass Flow OUT RCP Motor Can Mass Flow OUT Later RCS Sampling Mass Flow OUT Later Reactor Vessel Head Vent Reactor Vessel Head Vent Reactor Vessel Head Vent Izak .
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. s a
AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY Reactor Vessel Head Seal Leak Later Miscellaneous Valves Stem Leak Later 1st,2nd,3rd Stage ADS Mass Flow OUT lst,2H 3rd Stage ADS Mass Flow OUT Ist,2nd,3rd Stage ADS Leak 4th Stage ADS Mass Flow OUT 4th Stage ADS Mass Flow OUT 4th Stage ADS PRZ Safety Valves Mass Flow OUT PRZ Safety Valves Mass Flow OUT PRZ Safety Valves leak Breaks in RCS Pressure Boundary Later
- 1. FUNCTION MEANS ANALYSIS (Later)
This section identifies expected reliability (IE, seismic, aircraft impact, etc...), describes designed and/or preferred sequence or hierarchy between means with their specific advantages and disadvantages.
i l
l
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AP600 RCS Mass Inventory - Function-Based Task An ysts 4 FOR INFORMATION ONLY j
1 Table 1:
, f f FUNCTION BASED TASK ANALYSIS ISSUES SSAR Z$$UE ANSNER CONTENTS ANSWER LOC DOC LOC ?
O j )
i JCNZ1DRING / TREDBACK 2 1 DATA VALIDITY a Redundant Sensor Algorithm (ASA) a Data Quality Algorithm, a Logic Diagrams b iFuncti on b Analytical Redundancy (Inputs & b SSDs (Later ?) b FBTA parameters & al gorithm, cross checking) a e a n s c General Diagnostic Rules c Rule Based, topological c instrumen ta ti ons search, operator i
/ indications) expertise k 3 GCAL SATZSFACTION a Verify if planned Actions induce a Operator a l
planned results
\
b Identification of conditions for b Goal Monitoring b FBTA f goal satisfaction !
c Function control volumes c Function Control Volumes c FBTA 1 i
d Function parameters definition: d FL.nction Parameters d FBTA 1 instruments 1 Function Parameters 1 FBTA ;
2 Range, precision 2 AP600 Data Base 2 1 3 Valid operating conditions 3 Function Parameters 3 FBTA 4 Domain Definition (target, 4 Function Parameters 4 FBTA acceptable, una ccept abl e. . . )
. Setpoints AP600 Data Base . ;
. Zones . FBTA i Graphs
_. FBTA
}
2 MEANS ASSESSMENT a Identify Globally the Means a Function decomposition a FBTA Infl uencing the Function Parameters
- b Monitor globally the function b Display Means Essential b FBTA means (Relevant data) Data
, 4 NEANS PERFORMANCE a Actual means conditions: Display & Means Description J 1 Sources or sinks (How long a (a to c) {
(Monitor all source or a sink is a source t items of issue 8) or a sink !) I 2 Transport configuration &
l support i Type of motive force (Pumps, !
gra vity, natural circulation) ,
and support '
b Means Instrumentation 1 Valid operating conditions 2 Analytical redundancy c Design envelope & nominal conditions d Monitor successful path d Display e Monitor means versus design e Display envelope & nominal conditions i Monitor side-effects predictions i Display versus actual 5 PR0CEDURE a Procedure objectives a Procedures ADEQUACT The procedure will use functions, function means, components means, etc... as procedure elements.
b Monitor procedure objectives b Procedure Display c Monitor functions, function c Display i means, components means when they i are used.
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AP600 RCS Mass Inventory - Function-Based Task Analysis FOR ?NFORMATION ONLY l P PLANNING 6 COAL SELECTION a Goal priority a Level 3 function analysis, Operator, Tech spec, Procedures, Automatic actuation 7 CHOICES ANONG a Neans and means components design Means Description la to el a FBTA ALTERNATIVES bases b Identify expected reliability b FBTA (1 E, seismic o aircraft larpactoetc...}
c Neans acceptable range of c Means Design Envelope c FBTA operations d Neans capacities and Nominal Conditions d FBTA
' e Means side **ffects e FBTA i
f Designed hierarchy
/preferrd sequence or Neans structure analysis i FBTA (al t erna t i ve s, backup, g Neans Advantages / Inconveniences essential /non-essential) (f to g) 8 MEANS AVAILABILITY a Prerequisite means conditions a Means Description a TBTA
- Sources or sinks - Sources or Sinks - TB TA a
Transport configuration & - Means Alignments & = FBTA support transport support Moti ve force (Pumps. - Neans Motive Forces - FBTA gtavityo natural circulation) & support b Design envelope & nomirlal b Means Design Envelope b FBTA conditions and Nominal Conditions c Side-effects & Predictions c Neans Side-Effects c FBTA d Monigor means predicates for active and standby means e Tech Spec monitoring (?) ,
9 OVERRIDE AUTONATION a Zdentify manual automation Means Description (a to e) a FBTA override b Identify automation means b FBTA objectives c Identify the automation means c FBTA and control algorithm d Identify automation means data d FBTA e Identify control bandosetpoints e TBTA f Identify if manual override is i Tests i FBTA compatible with human reaction 1 and thinking time 10 REQUIRED MANilAL a Design bases a Means Description ACTIONS a FBTA b Identify the manual action items b Means Description b FBTA c Monitor requested versus actual c Display component position CONEROLLING 11 NEANS INITIA TION, a Means start function, means and a FBTA TUNING TERMINATION b Means tuning component Automations (a to b FBTA
- Tuning elements e)
- Tunable parameters, data
- Capacities
- Capacities combination
- Limits of manual tuning
- Margin versus safety functions actuation c Means stop c FBTA d Monitor effects on side-effects d Display (already in 03) e Monitor control boundary e Display conditions IE AP600 o; OCS-u]CM1 Rev B WP uastar Doc & Time : RCSMASSMD Janary 13,199415:26 uuo a: uuD43al Rev B Page - 24
FOR INFORMATION ONLY 1
Table 2:
I E MEANS DESCRIPTION STRUCTURE Iteam Means INTO Means OUT L1 Means Design Bases Means Design Bases X.2 Means Design Envelope and Nominal Means Desiga Envelope and Nominal Cnndi!%s Conditions
,p 13 Means Essential Data Means Essential Data 14 Means Sources Ejection Points DmsnBaus openne condaions Insins== ==
Support X.5 Means Traarps Means Transports X.5.1 Motives Forces Motives Forces Design Bases Design Baus s e m. e suppars condnaans A = == Auscrnanons X.5.2 Valves Valves '
X.5.3 Other Cnmpnnents Other Components X.5.4 Instruments Instruments 15.5 Analytical Instnamentation Checking Analytical Instrumentation Checking 16 Means Automations Means Automations 17 Injection Points Sinks Design Bues Operanon Condaions Insuurnernauon sopport 18 Potential Secondary injection Points Potential Secondary Sinks X.9 Side-Effects Side. Effects 1 10 Means Alignments Means Alignments NOTE: X stands for the Appendix Nurnber.
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AP s ventory - Funcuon-Based Task Analysis 4 1
, FOR INFORMATION ONLY 1 1 l
APPENDICES l
s i
a I !
i l i
j l
1 l l
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AP600 FOR INFORMATION ONLY 4h A. CVS Mass Flow IN A.1. Means Design Bases RCS-M3-001-0-pA1-1:
CVS provides a means to add (or remove for the equivalent OUT process) mass from RCS as mquired to maintain the programmed inventory during normal plant operations.
CVS-M3-001-0 p73: including plant startup, shutdown, step load changes and ramp load changes.
Memo: Compensation ofRCS water volume change due to temperature changes. :
CVS-Q: Can we get any graphics that could help to visualize the conditions ?
CVS-A: We got heatup and cooldown curves, RCP NPSH during cooldown (doc:
FD&RT-CSA-1050 Sep 16,93) and a preliminary curves for PRZ Nominal Water Level Program. More LATER.
CVS maintains the minimum PRZ level with makeup during a 50 'F per hour-cooldown from zero power to cold shutdown while maintaining normal purification flow.
CVS provides the ability to make up for larger leaks, including up to 3/8 inch ID instrument line break, and for anticipated SG tube leaks, such that the plant can be taken to cold shutdown using normal operating systems.
CVS provides a means for filling and pressure testing the RCS and provides connections for a temporary hydrotest pump.
RCS-M3-001-0-p17:
. During shutdown, ... the spray flow is manually controlled...
CVS-M3-001-0-p24: The CVS is designed to address a boron dilution accident by closing ONE of the 2 safety grade, motormperated gate valves from the DWS to the makeup pump suction (CVS-V136A/B).
CVS-M3-001-0-p25: For dilution events during shutdown, the source range flux doubling signal is used to isolate the line from the demineralized water system by closing the 2 safety grade remotely operated valves.
CVS-M3-001-0-p25: For refueling operations, administrative controls are used to A N 00 0: oCS-u]C401 Rn B WP Master Doc & Time : RCSuASSMD January 13.199413:26 uuo t: uuo.93401 Rna Page - 27
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AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY l
prevent boron dilution by verifying the valves in the line fmm the demineralized water system are closed and locked.
4 CVS-M3-001-0-p25: The DWS is isolated on a loss of offsite power (LOOP) signal.
A.2. Means Design Envelope and Nominal Conditions A.2.1. RCS Boron Control i
A.2.2. RCS Coolant Chemistry Control l A.2.3. RCS Mass Inventory A graph of the maximum flow capacity versus the RCS pressure for the basic i
configuration of means, i.e. the modulating valve is fully open and with one and two
- pumps on at 100% power.
Define on the above graph, the working domain, minimum and maximum flow and the nominal operating point.
A.2.4. RCS Pressure Control -
i Later.
A.2.5. RCS Temperature Control Later.
A.3. Means Essential Data Data Instrument Function Boron Concentration Sample RCS Boron Control Flow CVS-FT157 RCS Mass Inventory RCS Pressure Control Temperature None RCS Temperature Control A.4. Means Sources I
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i AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY g
A.4.1. CVS-MT01 Boric Acid Tank A.4.1.1. Source Des!;m Bases CVS M3-001-0-p31:
Sized to allow for 1 shutdown followed by a shutdown for refueling at the end of the fuel cycle.
Atmospheric vertical cylindrical flat bottom tank type.
CVS-M3-001-0-pD4: volume = 6200 gal.
. Little boric acid required during power operation since load follow is accomplished with gray rods and without change in RCS borun concentration.
Therefore, the boric acid which will be injected will have a negligible effect on the free oxygen level in RCS.
CVS-M3-001-0-p55:
Since the tank contains a low concentration of boric acid (2.5 weight %), no special heating requirements exist to prevent precipitation beyond normal freeze protection. Therefore, the tank may be located outside the buildings in the yard.
CVS-M3-001-0-p70:
. Samples are taken from the boric acid tank any time there is an indication that the boric acid concentration is not within the normal operating range.
A.4.1.2. Operation Conditions
? < Tank Level CVS LT109 < ?
? < Tank temp < ?
Boric acid concentmtion = 2.5 weight % (sample).
A.4.1.3. Source Instrumentations CVS.LT109
. CVS-M3-001-0-p64: This instrument channel indicates the level in the boric acid tank. level indication is provided on the main control panel along with high, low and empty level alarms. The high level alarm indicates the tank may soon overflow.
The low level alarm warns the operator to start makeup to the tank. An empty level alarm is set to give warning of loss of pump suction.
Boron Concentration Local samples can be taken at the CVS-Vill outlet.
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AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY i l l I i Temperature ?
. CVS-M3-001-0-pal-2: EHS provides freeze protection for the boric acid tank and l associated piping, which is located in the yard. ,
l A.4.1.4. Source Support Conditions CVS-M'ID2: Boric Acid Batching Tank i
Design Bases
. CVS-M3-001-0-p56: The tank will normally be empty. Batching of boric acid will be performed primarily just after plant shutdowns. Prepared boric l acid will be drained by gravity into the boric acid tank.
CVS-M3-001-0-pD5: venical cylindrical with top and bottom ellipsoidal (?)
heads. Volume = 800 gal.
Operation Condition l
l
. TIS 107 = ? (freezing and precipitation protection)
. LIl08 =7 Level checking: there is no evaporation compensation (tank in the yard).
. Boron concentration = 7 (sample)
If the level increases (V108 open or V113 leak) a new sample is to be requested.
1 Components
. CVS-V107 i CVS-M3-001-0-p37: This valve controls the steam flow to the boric acid batching tank. It is normally closed, fail closed, air-operated globe valve. It can be operated automatically by the batching tank temperature control channel or manually at the local control panel.
. LOA CVS-V101 (NC) j . LOA CVS-V102 (NC)
. CVS-MYY01 Boric Acid Batching Tank Mixer.
. LOA CVS-V108 (NC).
Wg i
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/
AP j p FOR INFORMATION ONLY g g Instrumentations
. Sample CVS-M3-001-0-p70: Sampling is performed via a local connection.
Samples are taken from the boric acid batching tank (CVS-MT02) prior to transferring boric acid to the boric acid tank (CVS-MT01).
CVS-V103 outlet.
. CVS-L1108 CVS M3-001-0-p64: This channel measures the water level in the borie acid batching tank. Level indication is provided locally. l
. CVS-TIS 107 j
CVS-M3-001-0-p63: This instrument channel measures the temperature '
of the fluid in the boric acid tank. It also opens and closes the steam l control valve (CVS-V107) to control the temperatum of the tank by l regulating the steam flow to the tank steam j
Operation Support Conditions
. DWS for filling:
CVS-M3-001-0-pal-1: DWS provides demineralized water flow to the boric acid batching tank at a flow of (LATER) gpm, at pressums less than 150 psig, and temperatures less than 150 'F during batching operations once every (LATER) days.
i
. Open LOA CVS-V101. l
. ASS for fluid temperature control (TIS 107, V107).
l CVS-M3-001-0-pal-1: ASS supplies 500 lb/hr steam at 298 'F (saturated at l 50 psig) at a max of 75 psig and recuperate the condensate return.
. Manual operation for boric acid fill.
i
. CVS-MYY01 Boric Acid Batching Tank Mixer.
. Open the LOA CVS-V108 (NC).
A.4.2. DWS: Demineralized Water System (Extemal Function)
A.4.2.1. Source Design Bases CVS-M3-001-0-p70: The DWS provides a source of suction to the CVS makeup pumps under the following conditions: Startup from Refueling, Startup from Cold a: ocs-uscar naa we uaw ox a w : RcsMAssMD January 13.199413:26 Yb uuo a: uuo osas ana Page - 31
AP600 RCS Mass Inventory - Function-Based Task Analysis I FOR INFORMATION ONLY / I I
I Shutdown and Burnup Dilution. These operations are not performed simultaneously but may be performed coincident with a boric acid batching operation.
CVS-M3-001-0-pal-1: DWS provides a source of suction to the CVS makeup pumps at between (LATER) and 140 T, and a flowrates up to 100 gpm of unborated reactor quality water during startuo from refueling. This operation will require (LATER) gallons of water to be delivered during a (LATER) hour period, and will occur approx once per 18 months.
CVS-M3-001-0-pal-1: DWS provides a source of suction to the CVS makeup pumps at between (LA'IER) and 140 T, and a flowrates up to 100 gpm of unborated reactor quality water during startuo from cold shutdown. This operation will require (LATER) gallons of water to be delivered during a (LATER) hour period, and will occur approx once per 18 months.
CVS-M3-001-0-pal-1: DWS provides a source of suction to the CVS makeup pumps at between (LATER) and 140 7, and a flowrates up to 100 gpm of unborated reactor quality water to compensate for core burnuo. This operation will require (LATER) gallons of water to be delivered during a (LATER) hour period, and may be performed as frequently as daily.
A.43. WLS Holdup Tank (External Function) '
A.4.3.L Source Design Bases Isolated by LOA CVS-V133 (NC).
CVS-M3-001-0-pal-3: ?
CVS-Q: No input about this interface ?
CVS-A: Later.
CVS-M3-001-0-p15: If an RCS loop is drained to a clean WLS holdup tank, this drained volume can be returned by opening the line to the makeup pumps from that holdup tank.
CVS-M3-001-0-pl3: All boric acid is batched, since no orovisions are incorporated for recycle from the WLS.
WLS-M3-001-0-p10: The effluent subsystem receives borated and hydrogenated liquid from 2 sources: the RCDT and the CVS. Effluent from the CVS is produced mainly as a result of RCS heatup and boron concentration changes.
Input collected by the effluent subsystem has the potential to be hydrogenate and to have dissolved radiogasses; therefore, it is routed through the WLS vacuum degasifier prior to being stored in the effluent holdup tanks. This feature allows the IWa: ocs.uscas uuv a: uuomas ana ans we uaur ox a rw : acsurssxo hary n. nu n;u mn Page - 3Z
AP600 RCS Mass Inventory - Function Based Task Analysis FOR INFORMATION ONLY 3
I g'
1 WLS to use atmospheric tanks without diaphragms.
This WLS degasifier can also be used by the operator to remove cases from the RCS by operating the CVS in an open loop configuration. This would be done by first taking one of the effluent holdup tanks out of normal waste service, and draining it empty. Then, normal CVS letdown thmugh the degasifier would be directed to that
- dedicated effluent holdup tanks. From there, it would be pumped back to the suction of the CVS makeup pumps with the effluent holdup tank pump. The makeup pumps would retum the fluid to the RCS in the normal fashion.
- A.4.4. SFS
- Spent Fuel Pit Cooling System (External Function) i A.4.4.L Source Design Bases s
' SFS-Q: Is it usedfor spentfuelpit boron concentration change ? Could this source be used ? Under what conditions ? (No spentfuel, sufficient cooling margin,...) What
- would be the restricdons ?
SFS-A: There is an intentional limit by layout.
SFS-M3-001-0-p39: The suction line to the CVS makeup pumps from the SFP (Spent Fuel Pit) is located 2' below the normal water level. This is also to ensure inadvertent draining or the possibility of air entrainment to the makeup pumps. ,, ;
l Isolated by LOA CVS-V130 (NC).
CVS M3-001-0-p72: The SFS provides a backup suction source from the spent fuel
{
pit to the CVS makeup pumps (CVS-MP01 A/B). The SFS will provide a source of l
borated makeup to the RCS in the event the normal suction to the CVS makeup l pumps is unavailable.
CVS-M3-001-0-pal-3: SFS provides a backup borated suction source at a flow rate of 180 gpm for up to 3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br />. This sourte of suction must be between 60 and 140
'F. It must be reactor quality water at refueling boron concentration.
l CVS-Q: What would be the reactor water quality ?
A.4.5. CVS-MT03 Chemical Mixing Tank l A.4.5.L Source Design Bases:
CVS-M3-001-0-p56: The tank will normally be empty. Mixing of chemicals will only be performed during shutdowns (hydrogen peroxide) and occasionally (LATER) during power operations (lithium hydroxide for pH control).
This source should be considered as low probable since the 3/4" DWS pipe will limit
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RCS Mass Inventory - Function-Based Task Analysis
- FOR INFORMATION ONLY <
I, l P
- the pump operation due to incompatible NPSH.
J DWS filling but isolated by LOA CVS-V120 (NC).
1 l CVS-M3-001-0-pal-1: DWS provides demineralized water flow to the chemical 3 mixing tank at pmssures less than 150 psig, and temperatures less than 150 'F during l batching operations once every (LATER) days.
CVS-M3-001-0-pD6: Vertical cylindrical with top and bottom spherical (?) heads.
Volume = 5 gal.
4 A.4.5.2. Source Components CVS-V121 Chemical Mixing Tank Inlet Valve
- CVS-M3-001-0-p35
- This Imcked-In-Position (LIP) valve restricts the makeup i flow rate entering the chemical mixing tank to limit the concentration of chemical solution going to the RCS via the makeup system.
CVS-V127 Chemical Mixing Tank Outlet Stop Check Valve
- A.5. Means Transports '
I A.5.1. Motive Forces 1
CVS-MP01A/B: Makeup Pumps ;
Component Design Bases
]
. CVS-M3-001-0-p29: Each provides full capability for normal makeup. l CVS-M3-001-0-p29: One makeup pump will be capable of maintaining normal j RCS inventory with leaks up to 3/8 inch ID instrument line break, without an J actuation of the safety injection systems. In the unusual event of an RCS leak i
beyond the capability of a single makeup pump, the 2nd pump could be i manually started.
. CVS-M3-001-0-p23: Since the pumps are of centrifugal type, significantly increased makeup will be available at decreased RCS pressures.
. CVS-M3-001-0-p76: Two 100% capacity makeup pumps are provided; therefore, either pump can be taken out of service for maintenance at any time, and may remain out of service without specific impact on the CVS's operation (e.g. Tech m
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AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY '
Ii IP Spec limits). Since operation of one of these pumps is required approximately l once per day in order to keep the plant on line, care should be taken to ensure that a pump is always available, and the duration of maintenance on the backup pump must consider the effects of the failure of the operational pump.
The pump which is designated as operational (i.e. to start and stop on CVS demand) should be switched between the 2 pumps provided monthly, in order to equalize wear between the pumps.
The makeup pumps are not used during refueling outages, and maintenance may also be performed then.
Support Conditions
. CVS-M3-001-0-pal-3: VAS provides ventilation and heat removal for the CVS makeup pump rooms, as necessary to accommodate the pump lube oil and motor coolers which reject (LATER) BTU /hr per pump in (LATER) 'F air I continuously.
. The pumps are supported by AC power.
. CVS-ME03A/B: Miniflow HX '
CVS-M3-001-0-p30: Each HX is designed to cool the flow through the CVS makeup pump miniflow recirculation lines to a desired temperature of 150
'F or less for pump protection. '
CVS-Q: HX outlet temperature or pump suction temp <= 150 *F ? What are the protections against a CCW malfunction ? HX CCW side flowmeter, CVS pump discharge temperature ?
CVS A: The 150 *F apply to the HX outlet temperature. (See CVS M3-001-0-pB1-14)
Automations CVS-M6-002-5: Stop & start and flowrate are controlled by makeup control system.
CVS-Q: 1s the logic part ofPi2 or something else ?
. CVS-M3-001-0-p12: One of the pumps will start automatically on PRZ low level signal. The pump automatically stops when the PRZ level increases to the correct value.
CVS-Q: What are the setpoint values ?
CVS-A: Later.
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l AP600 RCS Mass Inventory - Function-Based Task Analysis i FOR INFORMATION ONLY g S IP ,
CVS-M3-001-0-p24: The CVS makeup pumps are initiated upon receipt of a SI signal.
A.5.2. Valves i
CVS-V080: Check valve
. CVS-Q: What is the design reason ofits presence there ?
CVS-A: To avoid H, going into the purification loop (and trapped in the HX shell) instead to the RCS.
CVS-V081: Charging Stop Valve
. CVS-M3-001-0-p36: (NC, FO), air-operated stop check valve is located inside the containment on the charging line to the RCS. This valve can be closed to isolate charging downstream of the regenerative HX. In the open position, this valve functions as a normal check valve.
CVS-Q: Actuation signal ?
CVS-A: Exter.
. Supported by CAS.
CVS-V090, V091: Makeup Line Containment Isolation Valves
. CVS-M3-001-0-p36: (NO, FC) Motor-operated globe valves provide for containment isolation of the CVS makeup line and will automatically close on a containment isolation signal, high PRZ level or high SG level signal. These valves are interlocked to remain open on receipt of a containment isolation signal if there is high pressure in the makeup pump header. This allows the CVS to continue pmviding RCS makeup flow if the makeup pumps are operating during accident conditions. These valves are also controlled by the reactor makeup control system and will close when makeup to other systems is being provided. Manual control is provided in the MCR.
CVS.V115: Makeup Pump Suction Header Valve
. CVS-M3-001-0-p37: This air-operated, 3-way valve is automatically controlled by the makeup control system to provide the proper boric acid concentration of l makeup to the RCS. 'Ihe valve will fail with the pump suction aligned to the j boric acid tank on either a reactor trip signal, a source range flux doubling j signal, a Loss Of Offsite Power (LOOP) signal or a safety injection signal. This I valve can be manually operated from the MCR.
l . CVS-M3-001-0-p27: The effect of boration or dilution while the reactor is 4 web a g AP600 9: oCs-u]C401 RnB WP uamr Doc & Time : RCSuASsMD Jamary 13,199413:26 u u o a: uuo ns01 Rn a Page - 36
l l ~ ,
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' AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY
$P I subcritical must be monitored by observing the source range count rate. If the count rate increases at an unexpected rate the operation must be stopped.
- CVS-Q: What is the value of the une.xpected rate ?
CVS-A: LATER.
. Supported by CAS.
I CVS-V136A/B: Demineralized Water System Isolation Valves
. CVS-M3-001-0-p38: These norinally open, motor operated gate valves are located outside containment in the line from the demineralizer water storage l tank. These valves close on either a reactor signal, a source range flux doubling ,
signal, a loss of offsite power signal or safety injection signal isolating the i demineralizer water source to prevent inadvertent boron dilution events. Manual control for these valves is provided from the MCR.
CVS-V157: RCS Makeup Flow Control Valve
. CVS-M3-001-0-p38: (NC, FO) air-operated globe valve modulates to control 1 makeup pump flow to RCS. 'Ihe valve is normally controlled automatically by I the makeup line flow controller in conduction with the makeup contml system. '
The valve can be manually positioned by the operator. '
. Supported by CAS.
A.53. Other Components CVS S02: Makeup Filter
. CVS-M3-001-0-p33: To collect particulate matter larger than 25 miemns such as i boric acid tari sediment.
l
. Memo: W = C*SQRT(dP), dP record is not very useful but C would. C could eventually also be used to verify W and dP from time to time. A C limit could also be defined. l
. CVS-M3-001-0-p75: Monitor dP with the installed gages and change the filter cartridges when the pressure drop reaches 20 psi.
. CVS-M3-001-0-p79: The time required to change the filter cartridge can be accommodated under normal RCS leakage conditions by the PRZ contml band.
CVS-ME01: Regenerative HX AP600 R: oCs-u3CM1 Rev B WP ua.ner ooc & Time : RCSMASshfD January 13.19M 15:26 w
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FOR INFORMKrION ONLY 4
g ?l CVS-M3-001-0-p31: To recover heat fmm the purification loop flow leaving the RCS by reheating the fluid entering the RCS. This provides increased thermal efficiency and also reduces thermal stresses on the RCS piping.
1 CVS-Q: What about shell side heatup in case ofletdown with no recuperation ? l There is no safety valve on the shell side nor a pressure transmitter. The shell l side can have its volume restricted.
CVS-A: The valves interlocks will care about that possibility.
CVS-M3-001-0-p31: The design basis for the HX is the last hour of plant heatup, when expansion of the RCS will require a net removal of inventory.
CVS-Q: Are we talking about the regenerative HX or the letdown HX ?
CVS-A: The NET means [lN(tube side). Ol)T(shell side)]. In fact, this statement is applicable for both HXs.
CVS-M3-001-0-p76: In the event of minor tube leakage (from letdown in the tubes out to purification retum in the shell), the leakage will act as a purification loop bypass, and will not have any adverse affects (effects ?). Maintenance of this HX can be performed during refueling shutdowns after the cavity is flooded and the cavity purification system is in use.
CVS-Q: Could this leakage be detected by moving CVS FE025 at the HX shell outlet ? '
A.5.4. Instruments CVS FT025: Purification Loop Return Flow CVS M3-001-0-p63: The flow channel measures the purification flow prior to the regenerative HX in the retum path to the RCS, including any pumped makeup. Flow indication is provided in MCR.
CVS FT115: Boric Acid Flow CVS-M3-001-0-p62: This channel measures and controls (via the 3-way valve CVS-115) the total boric acid solution flow that goes to the makeup pump from the boric acid tank. This channel, in conjunction with CVS FIC157, modulates the 3-way valve, CVS-V115, to provide the proper amount of boric acid from the boric acid tank in order to achieve the desired quantity and concentration of makeup. Flow indication is provided in MCR.
CVS FT157: Makeup Pump Discharge Flow
. CVS-M3-001-0-p62: This instrument channel measures and controls (via valve CVS-V157) the total reactor makeup flow. Flow indication is provide in MCR.
AP600 c: oCs M3CM) Rev B WP Master Doc & Tbne : RCsMAsshiD January 13.199415:26 P%
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AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY E I E CVS PIl03:
CVS-M3-001-0-p60: This local omssure indicator shows the suction pressure to the CVS makeup pump, CVS-MP01A.
CVS PIl04:
CVS-M3-001-0-p60: This local pressure indicator shows the suction pressure to the CVS makeup pump, CVS-MP01B.
CVS-PIl05:
CVS-M3-001-0-p61: This local omssure indicator shows the discharge pressure for the CVS makeup pump, CVS-MP01A.
CVS P1106:
CVS-M3-001-0-p61: This local pressure indicator shows the discharge pressure for the CVS makeup pump, CVS-MP01B.
CVS PDIS110: Makeup Filter dP CVS-M3-001-0-p61: This local dP indicator measmes the dP across the filter and provided input to a high dP alarm in MCR. A high alarm indicates that the filter cartridge may be ready for change-out.
CVS-PSO45: Makeup Line Discharge Ileader Pressure CVS-M3-001-0-p62: This pressme switch is used to measure the pressure in the discharge header of the makeup pumps. This pressure switch is interlocked to allow the makeup line containment isolation valves (CVS-V090/91) to close on a containment isolation signal if low pressure is detected in the makeup pump discharge header. Low header pressure is an indication that the makeup pumps are not operating. This will allow the makeup pumps to continue providing RCS makeup flow if the pumps are operating during accident conditions.
l A.5.5. Analytical Instrumentation Checking CVS-Ff157
=
(CVS-FIV25) - (CVS-FT001) - (CVS-FT030)
. If CVS-TE002 is low, CVS-V040 or V041, V045 or V047 and V070 are closed.
ig k AP600 c: OCS-u]CMI RnB WP wasur Doc & Time : RCSMASSMD Janwy 13.199415:26 uuo a: uuomM1 naa Page - 39 i
FOR INFORMATION ONLY l
A.6. Means Automations l
A.6.1. Reactor Makeup Control CVS-M3-001-0-p65:
These instrument channels control the boric acid and reactor makeup water flow to the RCS. The reactor makeup contml consists of a 3- way valve armnged to provide a manually preselected makeup composition to the makeup pump suction header via gravity drain. The makeup control functions are to maintain the desired operating fluid inventory to the makeup pumps and to adjust reactor coolant boron concentration for reactivity.
The control switches are located on the main control panel along with the batch l integrators and the flow controllers. Two switches are provided: one for
' Off/ Manual / Dilute / Borate / Auto Makeup and another for Stop/ Neutral /Stan of the selected makeup pump. The second switch activates the makeup system after the i
desired mode is selected and the setpoints are established. It can also be used to terminate the makeup operation in any of the four modes of operation.
Descriptions of the operating modes will be provided LATER.
l A.7. Injection Points .
A.7.1. RCS SG MT01 Channel Head CVS-V081 Charging Stop Valve
. NC,FO
. Air operated stop check valve.
A.7.2. RNS Pump Suction This injection point is normally used in conjunction with the RNS feeding the CVS purification loop.
The isolation valve CVS-V079 (NC) is an LOA.
RNS-Q: When is that CVS suction line (in the RHR pump suction header) used ?
RNS-A: When the SG dams are installed then the PXS PRHR HX connec: ion to the SG plenum is closed.
i A.7.3. PRZ Aux Spray
- em AP600 0
- oCsu3C401 Rev B WP Master Doc & Tune : RCSMASSMD Janmary 13,199413:26 %
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AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY g l I A.7.3.1. Injection Design Bases RCS M3-001-0-pl7: To complete the pressurizer cooldown and filling in case of the
" water solid" cooldown. In case of " steam bubble" cooldown, the aux spray is used to reduce PRZ pressure and temperature for that condition.
l CVS-Q: p17 is not clear about which spray source (RNS, CVS purification loop or CVS Makeup) ?
l CVS-A: The RHR pump head is not supicientfor sprayflow. Only the CVS pumps have enough head tofeed the PRZ spray.
CVS M3-001-0-p27: To avoid severe thermal stress transients, do not use the aux spray unless the spray flow is being heated by the purification loop thmugh the regenerative HX or the PRZ temperature is less than (LATER).
RCS-M3-001-0-p52: The aux spray line should be connected to the bottom of the main spray line in the water sealed portion, as close as possible to the PRZ. This line should be routed to form a vertical cold trap approx 10 feet long between the main spray line and the aux spray check valve CVS-V085.
RCS-Q: Why this layout conditions ? Is it to protect the valve against thermal stresses ?
- RCS-M3-001-0-p52: The PRZ spray piping should be routed to minimize the volume exposed to steam and to provide a normally filled water seal extended as close as possible to the PRZ.
RCS-M3-001-0 p52: To minimize thermal shock effects, the spray line tee-junction should be located close to the top of the PRZ in the normally water-filled portion of the spray piping.
In classical PWR, the CVS aur. spray line is used during cooldown, and thus provides a rapid means of cooling the PRZ near the end of plant cooldown, when the RCPs are not operating.
A.7.3.2. Operation Conditions CVS-V084 Aux Spray Line Isolation Valve
. CVS-M3-001-0-p36: NC, FC, air-operated stop check valve is operated from the MCR.
See "CVS Aux Spray Mass Flow IN".
A.8. Potential Secondary Injection Points
% quemm AP600 0: oCs-u]CMI Rev B WP uaster Doc & Time : RCSMASShfD Janary 13,199413:26 uuo a: M u D os a l Rev s Page - 41
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AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY l
[ A.8.1. SFS: Spent Fuel Pit Cooling System SFS-M3-001-0-pal-1: CVS provides borated water as normal makeup source for the SFP refilling during nonnal operation, should the need arise, and during shutdown operations.
A.8.2. PXS: Passive Core Cooling System PXS-M3-001-0-pal-1:
1 CVS (through PXS) provides the boric acid solution for the initial filling and
! periodic makeup to the PXS Accumulators, the PXS CMTs and the PXS IRWST l in order to adjust level and/or boric acid concentration, j
. CVS (through PXS) provides a pressure source to test the isolation valves of the PXS accumulators, the PXS CMTs, the PXS IRWST, the RNS pump discharge line and the RNS pump suction lines.
CVS-V171: PXS Makeup Line Containment Isolation Valve CVS-M3-001-0-p38: NC, FC, air-operated globe valve automatically closes op the containment isolation signal. Manual control is provided in the MCR.
A.9. Side-Effects Later.
A.10. Means Alignments i
Later, i
- I P 4
)
4 i
I e
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AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY i
B. RNS Mass Flow IN-OUT B.I. Means Design Bases RCS-M3-001-0-p17: To be used for 2nd phase of cooldown when the RCS
- temperature is below 350 7 and the pressure is in the range 400 to 450 psig.
RCS-M3-001-0-p21: The PRHR connection is located in the bottom of the SG plenum, providing the lowest possible retum elevation to maximize the PRHR system natural circulation capability.
RCS-M3-001-0-pal-2: RNS provides the means for maintaining RCS pmification flow to the CVS during plan shutdowns.
RCS-M3-001-0-pal-3: RNS provides for low pressure makeup to the RCS for recovery from inadvertent actuations of the ADS.
RNS-M3-001-0-p2: The RNS shall reduce the temperature of the RCS from 350 P to 120 *F.
RNS-M3-001-0-p3: Operation of the system (RNS) must be consistent with the ,
established maximum RCS cooldown rate of 50 T/ hour and also consistent with maintaining the CCW below 110 7 during cooldown.
RNS-M3-001-0-p4: The system shall be designed such that all draindown operations can be performed from the MCR.
RNS-M3-001-0-p4: The system shall be designed to operate at full RNS flow rates throughout the duration of the refueling including when the level in the RCS is reduced to a "mid-loop" level to facilitate draining of the SG or removal of a RCP.
RNS-M3-001-0-p6 & 17: The RNS provides LTOP (Low Temperature Overpressure I Protection) for the RCS during refueling and shutdown operations.
RNS-M3-001-0-p8: The RNS is not used to control or mitigate the consequences of an accident.
Memo: AP600 does not take creditfor it but if RNS IS available we can use RNS.
RNS-M.3-001-0-p11: The RNS suction header is continuously sloped from the RCS hot leg to the pump suction. This will allow for the line to be self-venting and will allow the pumps to be started immediately once an adequate RCS water level is attained.
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is FOR INFORMATION ONLY I
RNS-M3-001-0-p12: During nonnal cooldown and refueling heat removal (pl3), the RNS operate with both subsystems of RNS pumps and HX.
RNS-M3-001-0-p12: RNS is designed so that any single failure of an active i component during normal cooldown will not preclude the ability to cool down, but l will only lengthen the time required to reach 120 'F.
RNS-M3-001-0-pi3: During the cooldown operations, the RCS water level is drained
- to a "mid-loop" level to facilitate SG draining and maintenance activities. For normal l refuelines. the level to which the RCS is drained is that which allows air to be l vented into the SG from the PRZ. This level is nominally an 80% water level in the HL.
RNS-M3-001-0-pl3: An effect of the step-nozzle is that the maximum air i
entrainment into the RNS pump suction has been shown to be no greater than 5%.
RNS-M3-001-0-pl4: The level (80%) to which the RCS must be drained is that
- which is sufficient to provide a vent path from the PRZ to the SG.
RNS-M3-001-0-pl4: Alarms are provided to alert the operator when the RCS level is
, approaching a low level. Furthermore, the isolation valves in the line used to drain the RCS are interlocked to close on a low RCS level during shutdown operations. All, operations reauired during mid-loop are performed by the operator in the MCR.
RNS-M3-001-0-pl4: The RNS is designed to operate without the need for flow i
throttling during mid-loop operation.
RNS-M3-001-0-p15: Draindown Procedure - At the appropriate time during the d
cooldown, the operator will initiate the draindown by placing the CVS letdown valve into " refueling draindown" mode. At this time the makeup pumps will be turned off and the letdown flow control valve will control the dnun rate to the WLS. The drain
, rate will proceed at an initial maximum rate of 100 gpm down to a drain rate of 20 gpm once the level in the RCS is to the top of the HL. The letdown flow control valve as well as the letdown line containment isolation valve will receive a signal to automatically close once the appropriate level is attained. Furthermore, alarms will actuate in the control room if the level continues to drop so that the operator would be alerted to manually initiate isolation of the letdown line.
RNS-M3-001-0-p20: During cold shutdown conditions, both RHR pumps and HX operate to circulate tractor coolant and remove decay heat. The RP 1 pumps are switched off when plant stanup begins. The RNS remains aligned to the RCS to maintain a low-pressure letdown path to the CVS. This alignment provides RCS purification flow and low temperature over-pressure protection of the RCS. As the RCPs are started, their thermal input begins heating the teactor coolant inventory.
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AP600 RCS Mass Inventory - Function-Based Task Analysis
- FOR INFORMATION ONLY I
d Once the PRZ steam bubble formatica is complete, the RNS suction header isolation i
valves (CVS-V001/2/5), and the discharge header isolation valve (CVS-V011) would j
be closed and tested for leakage, j
RNS-M3-001-0-p23: During refueling, as decay heat decreases and as fuel is moved to the spent fuel pit, one RHR pump and HX may eventually be taken out of service.
However all valves should remain aligned if the need would arise to start tids pump quickly in case of a failure of the operating RHR pump.
RCS-M3-001-0-pal-2: RNS provides for draining the RCS coolant inventory down to a "mid-loop" level during maintenancehrfueling operations.
i -
PXS-M3-001-0-pal-2: RNS provides IRWST injection to RCS prior to 4th stage ADS actuation B.2. Means Design Envelope and Nominal Conditions B.2.1. RCS Coolant Chemistry Control i
Later.
B.2.2. RCS Mass Inventory Later.
i B.23. RCS Temperature Control Later.
- B3. Means Essential Data i
Data Instrument Function Flow RNS-FID01B/ FIT)02B RCS Mass Inventory
- Temperature RNS-TE022ffE024 RCS Temperature Control B.4. Means Sources i
B A.I. RCS HL2 (Ejection Point) during RCS heat removal and/or RCS draindown j g6000: UD OCS-M3CMI Rev B WP Maner Doc & Tinu : RCSMASSMD Janwry 13,199413:26 uuo a: MMD-93al Rev B Page - 45
AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY 4
i b l
. A.2. CVS Purification loop (after CVS ME01 HX shell side) J during refueling.
CVS-M3-001-0-pal-3: RNS provides 100 gpm of flow at 72 psig above RCS pressure at not more than 380 T for purification of the RCS using the CVS purification loop during shutdown operations.
B.4.3. IRWST RNS-M3-001-0-p9: A single line from the IRWST is connected to the suction header prior to the suction header leaving containment. This line contains one (NO) motor-operated valve (RNS-V023) and provides a vent path to the IRWST in case of an inadvertent opening of the RNS isolation valves.
B.S. Means Transports B.5.1. Motive Forces RNS-MP01A/B: Normal RHR Pumps Component Design Bases l 1
RNS-M3-001-0-p24: Each pump is sized to provide the maximum flow required by its respective HX for Itmoval of its design basis heat load. )
Redundant pumps and HX ensure partial plant cooling if one subsystem is )
inoperative. A continuously open miniflow line is provided to protect the pump from operation at low flow conditions.
CVS-M3-001-0-p11: Since the motive force for the normal CVS purification i loop is the RCP, during plant shutdowns when the RCPs are stopped, the !
RNS will provide the motive force for the CVS purification.
Support Conditions j RNS-M3-001-0-pal-1: The CCW is the pump seal cooling system.
. RNS-M3-001-0-pal-2: VAS provides ventilation and heat removal for the RNS makeup pump rooms, as necessary to accommodate the and motor coolers which reject (LATER) BTU /hr per pump in (LATER) T air continuously.
1 RNS-Q: makeup pumps or RHR pumps with a makeup function ? 1 4e ums#
AP600 #: OC5-M3CM) Rn B WP Maner Doc & Time : RCSMASS.Mo January 13,199413:26 uuo #: Muo o3al ans Page - 46
t
, AP600 R ass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY I .2. Valves '
4' RNS-V001A/B, V002A/B: RCS Inner / Outer Suction Isolation Valves
. NC, F as Is.
RNS-M3-001-0-p9: The suction header is comprised of 2 parallel sets of 2 i
NC, motor-operated isolation valves in series. This arrangement allows for 4
RNS operation following a single failure of an isolation valve to open and also allows for RNS isolation following a single failure of an isolation valve j toclose.
i RNS-M3-001-0-p25: They are opened only for normal cooldown after RCS depressurization to 450 psig. They are controlled from the MCR and fail in the as-is position. These valves are protected from inadvertently opening I
when the RCS pressure is above 450 psig by an interlock. Furthermore, the pwer to these valves is administratively blocked during normal power operations.
RNS-V011: RHR Control / Isolation Valve RNS-M3-001-0-p26: This valve is used to control the total flow through the HXs to control the cooldown rate. This valve is designed for full RCS system pressure and also act as a containment isolation valve.
. RNS-M3-001-0-p11: The valve has power locked off from the MCR.
RNS-V021:
. RNS-M3-001-0-p11: A single safety valve is located off the RNS suction header inside the containment and is utilized for LTOP.
RNS-M3-001-0-pl9: RHR relief valve setpoint = 563 psig.
RNS-V022: RHR Pump Suction Header Isolation Valve
. NC.
RNS-Q: Failposition ?
RNS-M3-001-0-p25: This valve is designed for full RCS system pressure and also act as a containment isolation valve. The power to these valves is administratively blocked during normal power operations.
. RNS-M3-001-0-p9: Once outside containment, the suction header contains a AP600 9: OCS-u]C-001 Rev B WP uaner Doc & Time : RCSMASShtD Jamary 13,199415:26 4h uuD o: M u D os a l Rn a Page - 47
E AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY j g I l single NC, motor-operated isolation valve with power locked out at the MCR.
RNS-V023: IRWST Suction Line Isolation Valve
. NO. l RNS-Q: Fallposition ? l l
RNS-M3-001-0-p25: This valve is designed for full RCS system pressure l and also act as a containment isolation valve.
RNS V024: IRWST Discharge Isolation Valve
. NC.
RNS-Q: Failposition ?
RNS-M3-001-0-92 6: This valve may be aligned for full-flow testing of the RHR pumps or for operations which involve cooling of the IRWST.
B.S.3. Other Components RNS ME01A/B: Normal RHR HX
. See RNS-MP01A/B pumps for redundancy.
. RNS-M3-001-0-pal-1: The CCW is the HX cooling system.
. RNS-M3-001-0-p46: The RNS HXs tubes normally contain untreated reactor coolant, with a significant amount of N-16.
Memo: This is to remind the operator not to send anybody without precautions.
RNS ROIA/B: Normal RHR Orifices
. RNS-M3-001-0-p26: One RHR orifice is provided in each RHR discharge line to the PXS. The orifices are provided to limit RHR flow to the RCS via the DVI line and assures adequate purification flow to the CVS demineralizers.
B.5.4. Instruments RNSJT001/2: Normal RHR Pump A/A Discharge Flow th WP Ma.ner Doc & Time : RCSMASSMD January 13,199415:26 MD 476000: oCS-A*3CMI Rev B M MD #: MMD-93M1 Rev B Page - 48
AP600 RCS Mass Inventory - Function-Based Task Analysis '
FOR INFORMATION ONLY l i !
1 P !
An alarm is associated to these flowmeters.
. RNS-Q: low, high ? l l
RNS-PIO11/013 (local): RHR Pump A/B Suction Pressure
)
RNS-PIO12/014 (remote): RHR Pump A/B Discharge Pressure l b
Memo: Since the pumps are of centnfugal type, it would be possible to check the RCS water level when the pumps are not running and that the suction line is open.
Would the precision be acceptablefor a reading check ? )
RNS-TE021/023 (remote): RHR HX A/B Upstream Ter. perature t RNS-TE022/024 (remote): RHR HX A/B Downstream Temperature l B.5.5. Analytical Instrumentation Checking Later. 1 B.6. Means Automations Later.
B.7. Injection Points 1
B.7.1. RCS DVI A/B I during RCS normal heat removal or during IRWST forced injection for RCS makeup.
B.7.2. CVS Purification loop This injection point (after CVS-ME01 regenerative HX) is used in conduction with the ejection point (befom CVS-ME02 HX) and during refueling.
B.7.3. IRWST (Sink) during IRWST cooldown: l
. RNS-M3-001-0-p20: The RNS may be used to cool Jie IRWST during normal operation if the need arise.
during RNS full-flow test.
MP AP600 #: OCs u1CM) Rev B WP Master Doc & Time : RCsMAssMD January 13,199413:26 uuo #: M u o-93 M 1 Rev B Page - 49
AP600 RCS Mass Inventory - uncuon ased Task Analysis FOR INFORMATION ONLY F B.8. Potential Secondary Injection Points I P B.8.1. RNS pump leak to RNS pump room sumps RNS-M3-001-0-p43: Each pump compartment should have a floor drain which drains to a radioactive sump (to WRS See p-Al-2).
RNS-Q: Is it to protect the pump motor againstflooding or only to limit radioactive dose ?
RNS-A: The roomflooding has to be avoidedfor the pump motor but alsofor any electrical item.
RNS-M3-001-0-p44: Leakage while the pumps take suction from the IRWST jeopardize the passive safety systems capacity to perform its safety function.
Leak-detection devices, such as liquid level and radiation monitoring equipment, should be considered for each pump compartment with alarms located in the MCR. In case of RNS pump leak, the operator must stop both RNS pumps and remotely isolate the common suction line. Then the operator would close the manualisolation valves associated with the leaking pump and then reestablish cooling with the intact pump and HX.
B.9. Side-Effects Later.
B.10. Means Alignments later.
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AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY 1 h 1 I L. IRWST/ Sump Forced Mass Flow IN (Later)
C.I. Means Design Bases RNS-M3-001-0-p5:The RNS shall be used for Post-Accident Closed loop cooling once the passive safety systems have performed their function.
Memo: Function process sequence.
RNS M3-001-0-p5: The RNS shall provide low pressure makeup from the IRWST to the RCS following actuation of the ADS. Following an inadvertent actuation of the ADS, the RNS shall provide sufficient makeup flow to the RCS to prevent the CMTs from draining to the 4th stage ADS valve serpoint, thus preventing substantial containment flooding. Following actuation of the ADS in response to a LOCA event, l the RNS shall provide additional margin in core cooling. The RNS shall perform these functions in acconiance with the following criteria: initiation of the RNS within 15 min of either a safety injection or 1st stage ADS valve actuation signal.
RNS-M3-001-0-p6: The RNS must be designed to preclude the chance of inadvertently draining any or all of the water in the IRWST such that insufficient volume of water is available for post-accident long-tenn recirculation.
RNS-Q: Is there no possibility oflayout restrictions asfor the CVS intake the from SFS pit ?
RNS-M3-001-0-p16: The RNS system is designed to be manually initiated by the operator following receipt of an ADS signal. If the system is available, it will provide RCS makeup once the pressure in the RCS falls below the shutoff head of the RHR pumps.
4 RNS-M3-001-0-p17: The RNS shall not jeopardize the ability of the passive safety system to mitigate design basis accident. To ensure this, the system will not be operated if high radiation levels are detected inside containment. Furthermore, if the system is providing makeup to the RCS from the IRWST, the level in the IRWST 4
shall remain above the limits specified by the PXS SSD.
RNS-M3-001-0-p23: (Accident Operations) Upon actuation of automatic 4
depressurization, the RNS will be employed to provide low pressure RCS makeup.
Provided that radiation levels inside containment are below a high radiation value.
the operator will open the RNS suction and discharge isolation valves and start the RNS pumps.
i RNS-Q: What is the design basisfor the radiation limit ?
RNS-A: The shielding would be insufficient.
AP600 9: oCs-M3CM1 RnB WP Master Doc & Tbne : RCSMASSMD January 13.1994 IL26 uno a: u no.n a s Rn a Page - 51
. v
.t AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY ED b C.2. Means Design Envelope and Nominal Conditions C.2.1. RCS Boron Control C.2.2. RCS Coolant Chemistry Control C.23. RCS Mass Inventory Later.
C.2.4. RCS Pressure Control Later.
C.2.5. RCS Temperature Control Later.
CJ. Means Essential Data Data Instrument Function Boron Concentration Sample RCS Bomn Control Level RNS-FID01B/002B RCS Mass Inventory RCS Pressure Control Temperature RNS-TE022/024 RCS Temperature Control C.4. Means Sources 1
C.4.1. IRWST C.4.1.1. Source Design Bases l l
PXS-M3-001-0-pl3: The pH adjustment tank provides the capability for chemical addition to the containment recirculation sump in certain severe accident floodup )
conditions where core damage has occurred and core radioactivity has been released {
from the RCS into containment. The tank initiate chemical addition upon receipt of a high containment radiation signal, using 2-of-4 logic coincidence.
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AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY I
i b I PXS-Q: More parameters should be part of the logic if high containment radiation signal can be generated withoutfloodup and core damage.
PXS-M3-001-0-p14: The pH adjustment tank is filled with sodium hydroxide, sealed i from the containment atmosphere, and maintained at a slight pressure using nitrogen cover gas to establish an inert atmospheir and exclude oxygen and/or water vapor l from the tank.
PXS-M3-001-0-p14: The design minimizes the impact of spurious actuation by having dedicated discharge sumps that can hold the entire tank contents and by using squib valves which do not open on a loss of power.
PXS-M3-001-0-pD9: Vertical cylinder with top and bottom spherical (?) heads. The volume = 160 ft'.
PXS-M3-001-0-p27: The IRWST is sized to provide flooding of refueling cavity for normal refueling, post-LOCA flooding of the containment to establish long-term RCS cooling, and to support the PRHR HX operation. Flow out of the IRWST during the injection mode includes conservative allowances for spill during a DVI line break.
PXS-Q: IRWST level setpoints ? See PXS-M3-001-0-pD5 to have some ideas.
1 -
Memo: It is expected to get the IRWST level setpointsfor Feb 94.
XYZ-Q: How many sumps are involved ? Are they interconnected ? Are these connections protected against clogging ? Needfor a containment "section" with elevationsfor the critical system points. A 3D view with the principal water masses and the critical elevations would be very handy.
C.4.1.2. Operation Conditions Later.
C.4.1.3. Source Instrumentations PXS-LT045/046/047/048 C.4.1.4. Source Support Conditions (Later)
PRZ through ADS (1,2 and 3) spargers.
RNS-V021 relief valve.
CVS makeup.
RNS NRHR HX.
SFS.
Yuuoa:a: uuo-nal ocs-uscai en a an a we uuur ox a ruu : acsuAssao saary n, nu nas Maw Page - 53 l
.. - .. . _ . _ . - - = - _ - -
AP600 RCS Mass Inventory - Function-Based Task Analysis t
- FOR INFORMATION ONLY b I!
Containment steam condensation.
I .
PXS-M3-001-0-p20: Containment steam condensate is collected by a gutter arrangement at the operating deck and drained back into the IRWST.
C.4.2. Containment Sump j C.4.2.1. Source Design Bases l 1
Later. l 1
C.4.2.2. Operation Conditions !
I RCS-V117A/B and V118A/B: f
. RCS-M6-002-5 Note 19: open on IRWST LO-3 level signal.
. Memo: There are 2 sump connections: one with a 4" dia and one with a 10" dia.
Sumps levels l C.4.2.3. Source Instrumentations PXS.LS050/051/052 i
PXS-M6-002-5 Note 14: Multiple discrete level signals cover containment level l from bottom of RV cavity to operating deck. l C.4.2.4. Source Support Conditions ;
t PXS-MT04: pH Adjustment Tank Design Bases PXS-M3-001-0-pl3: The pH adjustment tank provides the capability for chemical addition to the containment recirculation sump in certain severe accident floodup conditions where core damage has occurred and core radioactivity has been released from the RCS into containment. The tank initiate chemical addition upon receipt of a high containment radiation signal, using 2-of-4 logic coincidence, l PXS-Q: More parameters should be pr t of the logic if high containment radiation signal can be generated withoutfloodup and core damage.
' AP600 9: oCS-u3C-001 Rev B WP uasser Doc & Time : RCSMASSMo Janary 13,199415:26 uuo a: u x o-os a l Rev B Page - 54 9
AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY I b PXS-A: The high containment radiation level is very high.
. PXS-M3-001-0-pl4:'Ihe pH adjustment tank is filled with sodium hydroxide, sealed fmm the containment atmosphere, and maintained at a slight pressure using nitrogen cover gas to establish an inert atmosphere and exclude oxygen and/or water vapor from the tank.
PXS-M3-001-0-p14: The design minimizes the impact of spurious actuation by having dedicated discharge sumps that can hold the entire tank contents and by using squib valves which do not open on a loss of power.
PXS-M3-001-0-pD9: Venical cylinder with top and bottom spherical (?)
heads. The volume = 160 ft'.
Operation Condition Later.
Instrumentations Later.
C.S. Means Transports See "RNS Mass Flow IN-OUT".
C.5.1. Motive Forces See "RNS Mass Flow IN-OUT".
C.5.2. Valves See "RNS Mass Flow IN-OUT".
DCP-91-045/0 p15:
. 2 check valves are in series to prevent draining the IRWST into containment due to gross backleakage fmm a single check valve.
. There is an additional MOV flowpath to improve the reliability of the recirculation flowpath. This is important for the recirculation line since it not only provides gravity injection, but it also provides an injection source for the RNS pumps. MOV gate valves are used instead of check valves to 4h 6E AP600 I: OCS-u3C401 Rn B WP Manor Doc & Time : RCSMASSMD Janmary 13.199415:26 uo a: uuD nool RaB Page - 55
K
- AP600 RCS Mass Inventory - Function-Bared Task Analysis FOR INFORMATION ONLY
, s i
l I l provide diversity.
i
. The MOVs also offer an additional capability that is not available from
- check valves. They also allow intentional opening of this line so that
- IRWST can be used to flood the RV cavity for a severe cccident sequence where no gravity injection has occurred, core damage has occurred, and this
- action may provide direct cooling of the RV.
j C.53. Other Components See "RNS Mass Flow IN-OUT".
i
- C.5.4. Instruments i
See "RNS Mass Flow IN-OUT".
C.5.5. Analytical Instrumentation Checking i
J -
See "RNS Mass Flow IN-OUT'.
C.6. Means Automations .
See "RNS Mass Flow IN-OUT". '
i
. C.7. Injection Points C.7.1. RV DVI A/B j C.8. Potential Secondary Injection Points 1
C.8.1. Containment Sumps
- umr.
4 j C.8.2. SFS Pump Suction
' Later.
C.83. PXS Test Header i
i t1 Later.
I Nk @h
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{ AP600 RCS Mass Inventory - Function-Based Task Analysis
- , FOR INFORMATION ONLY i
l C.8.4. RNS Pump Suction WW 4
.i Later.
I
- C.9. Side-Effects 4
I Later, i
j.
C.10. Means Alignment
- Later.
i 1
N i
k 1
i t
h a 1
1 i
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- bruD a: uuo oso01 Rev a Page - 57
i I
ass nventory - Function-Based Task Analysis 1
FOR INFORMATION ONLY
! l B p
.). Refueling Cavity Filling and Draining l D.1. Means Design Bases 2
RNS-M3-001-0-p22: All water transfers from the IRWST to the refueling cavity are performed by *he SFS. This function has traditionally been performed by RHR i
systems and ti at capability does still exist if the need arises. But utilizing the RNS would involvt floodmg the refueling cavity through the RV. This has contributed to clarity problems in the refueling cavity and has contributed to additional ORE.
- Therefore the SFS is utilized to flood the refueling cavity without flooding through i se RV.
l~
RNS-Q: What were the problems ?
RNS-A: To ask to plant operation people.
PXS-M3-001-0-pal-2: SFS provides the initial filline of the PXS IRWST.
PXS-M3-001-0-pal-2: SFS provides a means to purify and sample the refueling water in the PXS IRWST.
PXS-M3-001-0-pal-2: SFS provides a means, during refueling operations, to transfer the PXS IRWST refueling water to the refueling cavity and back to the PXS IRWST.
Transports. [2 alternatives: SFS (preferred) and RNS]
D.2. Means Design Envelope and Nominal Conditions D.2.1. RCS Boron Control Later.
D.2.2. RCS Coolant Chemistry Control Later.
D.2.3. RCS Mass Inventory Later.
D.2.4. RCS Pressure Control Later.
M 4h AP600 0: oCS-u]CM1 Rev B WP Master Doc & Time : RCSMASShiD January 13,199415:26 uuoe: uuo-osai Re, s Page - 58
1 4 i l
AP@
FOR INFORMATION ONLY l
$ I I 1
- D.2.5. RCS Temperature Control Later.
D3. Means Essential Data Data Instrument Function i
Boron Concentration RCS Bomn Control Flow RCS Mass Inventory 4
l RCS Pressure Control '
l Temperature RCS Temperature Control l D.4. Means Sources D.4.1. IRWST .
During refueling cavity filling.
See "IRWST/ Sump Mass Flow IN".
D.4.2. Refueling Cavity During refueling cavity purification.
During water transfer from the refueling cavity to IRWST.
D.4.2.1. Source Design Bases Later.
D.4.2.2. Operation Conditions Later.
D.4.2.3. Source Instrumentations Later.
'D.4.2.4. Source Support Conditions e@
AP600 0: OCS~u]CMI Rev B . WP Maner Doc & Time : RCSMASSMD Janmxry 13,199413:26 W uuo a: u u o-os a l Rev B Page - 59
._. _ . ~ _ . . - _ _ . . _ _ _ _ _ _ _ _ . . - . _ . . _ . - - _ . . _ _ . . . _ . . . _ . _ _ . . _ _ _ . . _ - _ . . . . . . - - _ . _ . _ _ _ . _ . _ . _
~ <
b AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY l F t.ater. l P l
D.5. Means Transports D.5.1. Motive Forces l
Later. '
D.5.2. Valves Later.
D.5.3. Other Components Later.
D.5.4. Instruments Later.
D.5.5. AnalyticalInstrumentation Checking -
Later.
D.6. Means Automations Later.
D.7. Injection Points Later.
D.7.1. Refueling Cavity Later.
D.8. Potential Secondary Injection Points Later.
D.9. Side-Effects
~^
b any AP600 N: OCS.M3C401 Re, B WP Master Doc & Time : RCSMASSMD January 13, J9941526 uuo u: uuD oss01 Re, n Page - 60
> s ,
j AP600 RCS Mass Inventory Function-Based Task Analysis i
FOR INFORMATION ONLY 4
I 1B>
! Later.
D.10. Means Alignment l
i Later.
l i
NW i
{
4
}
l l
4 i
n .
l i
4 l
t
" " *: Xs u3cas Rn a we uanar ox & ua : RcsitAssxo sana, j3, joo4 ;3;2g
, ,, p, ,, Page - 61
AP600 RCS Mass Inventory - Function Based Task Analysis FOR INFORMATION ONLY P '
9 P E. CMT Mass Flow IN E.1. Means Design Bases CVS M3-001-0-pil: In case of max leak allowed by Tech Spec (10 gpm), the CMT injection can provide sufficient makeup to delay the ADS actuation for at least 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br />, and after ADS actuation, can also provide sufficient borated water to' compensate for RCS shrinkage and assure RCS boration for a cold shutdown from hot conditions.
PXS-Q: PXS-M3-001-0-p2 para 2.1 mention 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br />.
CVS-M3-001-0-p26: CMT level and inlet and outlet temperatures are monitored by indicators and alarms.
PXS-M3-001-p20: At CMT LO-LO level serpoint (~75% full) the ADS is actuated.
This level serpoint assures that the CMTs contain sufficient borated water to compensate for RCS shrinkage and provide boration of the RCS for a cold shutdown from hot plant conditions.
PXS-M3-001-0-p31: The (check valves that open with low dP) valves will be to indicate when the valves are fully open and fully closed. -
PXS-Q: In PXS-M3-001-0-p32, the statement is specficfor the CMTs check valves (low dP), Are the Accumulators (high dP) and PRZ (Iow dP) check valves eqwpped with nonintrusive position sensors ?
PXS-M3-001-0-p32: The purpose of installing check valves in the CMT discharge is to prevent reverse flow from the accumulators through the CMT for large cold leg LOCA events, with a break either in the cold leg near the CMT pressure balance line or in the pressure balance line upstream of the CMT isolation valves.
DCP-91-045/0 p27:
. The purpose of the CMT discharge check valves is to prevent the accumulator from discharging backwards through the CMT and wasting injection flow for the case where a large cold leg break has occurred. In this event, once the CMT inlet and outlet valves have opened, the low pressure at the CMT inlet line could divert some of the accumulator injection flow.
. With the 2 check valves in series, there is a potential problem with a single failure of either CMT discharge valve to open, since they are normally shut. This concern is different from that in the accumulator, where a significant differential pressure exists to open the check valves. The use of a normally open check valve can climinate the potential failure to open. In this application, it is preferable to use a valve that shuts with the least amount of reverse flow to minimize the significance of check valve slamming and the potential water
%AP600 c: oCs-M3C 001 Rn B WP Maw Doc & Time : RCsMAsshfD January 13.199413:26 e nth uxo a: M u o-ossol an a Page - 62
AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY
! D hammer that could result. E In order to maintain the check valves in the open position, the check valves would be installed in an inverted configuration. This arrangement has been successfully used in other plant designs. The use of tilt disc check valves is preferred in this case since they are nearly balanced and a much smaller reverse flow is needed to close these valves. Therefore, the attendant valve disc slamming is minimized for the case where teverse flow occurs.
E.2. Means Design Envelope and Nominal Conditions E.2.1. RCS Boron Control Later. !
E.2.2. RCS Coolant Chemistry Control i
Later.
E.2.3. RCS Mass Inventory -
3 Later. ,
E.2.4. RCS Pressure Control I
Later. 1 E.2.5. RCS Temperature Control Later.
E.3. Means Essential Data 1
Data Instrument Function )
Boron Concentration RCS Boron Control Flow RCS Mass Inventor /
i RCS Pressure Control Temperature RCS Temperature Control I
E.4. Means Sources ;
ee Mk s AP600c: OCS M3CM1 Rev B WP Master Doc & Time : RcSMASSMD Janmary 13.1994 IS:26 HWD a: u u o.93 a 1 Rev a Page - 63 i
AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY up WW a
E.4.1. PXS-MT02A/B: Core Makeup Tanks l
E.4.1.1. Source Design Bases
. PXS-M3-001-0-pil: There are 2 CMTs located inside the containment at an elevation slightly above the reactor coolant loops. Each tank is filled with borated water and connected to a DVI line and 2 pressure balance lines, one connected to the PRZ and one to the cold leg. The line to the PRZ is smaller, designed for makeup during non LOCA events. It is normally open to avoid water hammer by ensuring that the CMT is full of water and at the same l pressun: as the RCS.
l . In standby mode, the CMTs are at PR2 pressure to avoid water hammer.
l PXS-M3-001-0-p19: The PRZ line and a portion of the cold leg line between the isolation valves and the CMT are normally maintained full of steam, with condensate removed through a steam condensate drain back to the cold leg channel head of one SG.
i PXS-M3-001-0-D 3: Vertical cylindrical tanks with top and bottom spherical (?).
l heads type. The volume = 2000 ft'.
E.4.L2. Operation Conditions '
Later.
E.4.1.3. Source Instrumentations l
RCS-LS011/013 RCS-LS012/014 RCS-LS015/017 l RCS LS016/018 l
l E.4.L4. Source Support Conditions Supported by CVS makeup.
E.5. Means Transports E.5.1. Motive Forces
~ Stuen EY600 R: OCS M3C 001 Rn B WP Master Doc & Time : RCSMASSMD January 13. 1994 13:26 MMD 9: MMD-93401 Rna Page - 64 l
1 l
AP600 RCS Mass Inventory - Function Based Task Analysis FOR INFORMATION ONLY I I l l dP (steam from PRZ or cold leg):
. between cold leg and DVI, (large diam for makeup during LOCA),
. between PRZ anc' cold leg (small diam for makeup during no-LOCA events).
PXS-M3-001-0-p26: The CMT will inject to the RCS as inventory is lost and steam is supplied to the CMT to displace the water that is injected. This steam is provided to the CMT through either the PRZ pressum balance line or the cold leg pressure balance line, depending upon the specific event that has occurred. The inlet line from the PRZ is sized to supply sufficient steam to allow CMT injection to mitigate nonLOCA events, when the cold legs may not be voided. The large inlet line from the cold leg is sized for LOCA events, where the cold legs become voided and higher CMT injection flows are required. Both of these pressure balance lines are sized to accommodate the additional steam that condensates in the CMTs.
E.5.2. Valves PXS-V002A/B, V003A/B, V014A/B and V015A/B -
. NC,FO
. Open on safeguard signal.
PXS-Q: Which signal and 4 at the same time ?
. PXS-M3-001-0-p20: The discharge isolation valves open on LO-LO PRZ level signal.
. PXS-M3-001-pal-1: PXS CMTs valves have hardwired switches in the MCR.
. Supported by CAS.
PXS-V005A/B
. NO,FAI
. Used to maintain CMT pressure = PRZ pressure.
The valves are closed during testing.
. Supported by DC power.
s PXS-V030A/B, V031A/B
.,, NC,FC AP600 c: OCSM3CM1 RnB WP Maner Doc & Teu : RC5xA55blD January 13.19% 15:26 MD Muo c: u u o-os a s RnB Page - 65
AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY
. used as backup to eliminate condensate.
. Supported by DC power.
PXS-V033A/B
. NO, FO
. Supported by DC power.
Provide normal condensate removal flowpath.
E.5.3. Other Components PXS R01A/B E.5.4. Instruments RCS-TE001 .
RCS-TE002 RCS-TE003 RCS-TE004 E.5.5. AnalyticalInstrumentation Checking Later.
E.6. Means Automations PXS-M3-001 p20: Upon receipt of a "LO-LO" PRZ level signal, the discharge isolation valves for both CMTs are opened. The relative elevations of CMTs (which are full of cold water. Higher density than RCS water.) and PRZ (at "LO-LO" level with hot RCS coolant. Lower density than CMT water.) are such that the water in the CMTs willinject into the RV and testore the PRZ water level to approximately the "no-load" level, while steam from the PRZ steam space flows to the top of the CMTs equalizing pressure in both CMTs with PRZ pressure.
PXS-M3-001-0-p20: The CMTs are provided for RCS makeup and boration automatically WHEN the CVS is unavailable or insufficient. If the normal CVS makeup can be reestablished, the CMTs can be isolated and normal makeup AP600 0: OCS-M3C401 Rn B WP Maner Doc & Time : RCSMASSMD January 13,199413:26 uno a: uuD-93 sol Ra a Page - 66
AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY operation resumed.
E.7. Injection Points E.7.1. DVIA/B E.8. Potential Secondary Injection Points Same as for "IRWST Forced Mass Injection". (Same line to DVI).
WPS RCDT (3/4" BBA LOO 4A/B): Cold leg to RCDT.
PSS (LOA PXS-V011A/B and PXS-V010A/B from CMT connection).
PXS (Check valve leak PXS-V231 A/B, AOV PXS-V230A/B from CMT connection)
E.9. Side-Effects
~
Later.
E.10. Means Alignment .
Later.
IP S
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s FOR INFORMATION ONLY i i L i F. Accumulators Mass Flow IN 3
- F.1. Means Design Bases Later.
F.2. Means Design Envelope and Nominal Conditions s F.2.1. RCS Boron Control Later.
F.2.2. RCS Coolant Chemistry Control Later.
l F.23. RCS Mass Inventory Later.
F.2.4. RCS Pressure Control >
- Later.
3 F.2.5. RCS Temperature Control e i
uw.
f F3. Means Essential Data i Data Instrument Function Boron Concentration RCS Boron Control i Flow RCS Mass Inventory
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l AP600 RCS Mass Inventory - Function Based Task Analysis j M FOR INFORMATION ONLY I
1 B F.4.1. PXS-MT01A/B: Accumulator Tanks WN j F.4.1.1. Source Design Bases b -
PXS-M3-001-0-19: The 2 SI accumulators are normally maintained approx 85% ,
- full of water, with a nitrogen cover gas at about 700 psig. l
. PXS-M3-001-0-pD2: Spherical accumulator type. Volume = 2000 ft'.
. P acs > P 4cc maintains the injection line closed.
i F.4.1.2. Operation Conditions
- Water level. Later.
N2 Pressure. Later.
Boron concentration. Later.
1 j F.4.1.3. Source Instrumentations RCS-LS021/023 -
j RCS LS022/024 RCS.Fr027/029 RCS Fr028/030 I 2
i F.4.1.4. Source Support Conditions i
j -
PGS for N 2supply to pressurize the accumulators. i filled by CVS makeup F.5. Means Transports F.5.1. Motive Forces The motive force is provided by the pressure difference between the accumulator pressure and the RCS pressure.
i W h>
A n co a: ocs-u3cas ana wr Maur ou a Tu : acsurssno jam n.1m n.u
- uuo a: uuo nas ana Page - 69
AP600 RCS Mass Inventory - Function Based Task Analysis FOR INFORMATION ONLY l P F.5.2. Valves PXS-V021A/B
. NC,FC
. isolates the accumulators from N2 supply.
. Supported by DC power.
PXS-V027A/B
. NO, FAI (breaker racked at power)
. Supported by DC power.
PXS-V041
. MOD, FC. Regulates the N2 Pressure to the accumulators. -
i
. Supported by PGS (self actuating pressure regulating valve),
PXS-V042: N2 Feed Line
. NO,FC.
. closes on T signal.
. Supported by CAS.
F.5.3. Other Components FXS-R02A/B F.5.4. Instruments See " Source Instrumentations".
F.5.5. Analytical Instrumentation Checking Later.
F.6. Means Automations uns tumm amm' AP600 0: OCS-M3C.001 RnB W? Master Doc & Time : RCSMASSMD Janwy 13.199413:26 MMo e: Muo-osas ana Page - 70
-- .__~ - - -
AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY I I None.
F.7. Injection Points F.7.1. DVIA/B F.8. Potential Secondary Injection Points Same as for "IRWST Forced Mass Injection". (Same line to DVI).
F.8.1, WLS i
PXS-M3-001-pal-2: WLS accepts borated water drained from the PXS accumulators to adjust level and/or boric acid concentration.
F.9. Side-Effects Later.
F.10. Means Alignment Later.
1h
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AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY I
- b. IRWST/ Sump Natural Mass Flow IN G.I. Means Design Bases PXS-M3-001-0-p12: The IRWST is located in the containment at an elevation slightly above the RCS loop piping. Its injection is possible only after the RCS has been depressurized by the ADS or by a LOCA. After the accumulator, CMTs, and the IRWST inject, the containment will have flooded up to a level sufficient to recirculate water through a check valve and back into the RCS.
PXS-Q: What is that level and what is the instrument ID ?
PXS M3-001-0-p19: The IRWST is normally maintained nearly full of water, with an air space at the top of the tank that is scaled from the containment atmosphere.
PXS-M6-002-5: The IRWST must have ... vent pipes made from ... Each vent must have an airtight cover that will blow off at a dP of 6" of water.
Memo: The design is based on natural circulation and therefore involves low pressure differences. Special attention should be given to pressure instrumentation '
location and range.
G.2. Means Design Envelope and Nominal Conditions G.2.1. RCS Boron Control G.2.2. RCS Coolant Chemistry Control G.2.3. RCS Mass Inventory A graph of the maximum flow capacity versus the RCS pressure for the basic configuration of the means, i.e. the modulating valve is fully open and with one and two pumps on at 100% power. LATER.
Define on the above graph, the working domain, minimum and maximum flow and the nominal operating point. LATER.
G.2.4. RCS Pressure Control Later.
G.2.5. RCS Temperature Control AP600c: oCsst3C 001 Rn B WP Mwer Doc A rew : RCsMAssMD January 13. I99413.26 uuo a: u u D o3 m 1 Rn a Page - 72
1 y600 RCS Mass Inventory - Function ased Task Analysis FOR INFORMATION ONLY 4
I Later. d i l
- G3. Means Essential Data i l l l
- Data Instrument Function l Boron Concentration Sample RCS Boron Control Level PXS-LT045/046M47/048 RCS Mass Inventory RCS Pressure Control Temperature -
RCS Temperature Control G.4. Means Sources I G.4.1. IRWST t
See "IRWST/ Sump Forced Mass Flow IN". -
l
!. G.4.2. Sumps See "IRWST/ Sump Forced Mass Flow IN".
G.5. Means Transports G.5.1. Motive Forces Gravity P m awrr > P m ny G.5.2. Valves PXS-V117A/B & V118A/B PXS-V119A/B & V120A/B PXS-V121A/B PXS-V122A/B & V123A/B G.53. Other Components 1D Wb AP600 c: OCS-M3C401 RnB WP Master Doc 4 Tew : RCSMASSMD January 13. I99413:26 MMo a: u M D-93 Dol anB Page - 73
l
. . I
- H -
- . - .- unction-Based Task Analysis l FOR INFORMATION ONLY
.t GE PXS R03A/B I
G.5.4. Instruments l l
None. l G.5.5. Analytical Instrumentation Checking i None.
G.6. Means Automations Later.
G.7. Injection Points G.7.1. DVI A/B G.8. Potential Secondary Injection Points Later. ,
G.9. Side-Effects Later.
G.10. Mear, Alignment later.
4D m c: OCSu3C401 RnB WP ustur Doc & Tuew : RCSuASShtD January 13.199413.26
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AP600 RCS Mass Inv::ntory - Function Based Task Analysis FOR INFORMATION ONLY l I CVS Letdown Flow OUT H.1. Means Design Bases RCS-M3-001-0-pal-1:
CVS provides a means to remove (or to add for the equivalent IN e.xess) mass from RCS as required to maintain the programmed inventory during normal plant operations.
CVS-M3-001-0-p73: including plant startup, shutdown, step load changes and ramp load changes.
Memo: Compensation of RCS water volume change due to temperature changes.
RCS-M3-001-0-pl6: Prepare RCS opening by reducing hydrogen and fission gases with WLS. The PRZ liquid level is reduced to the no-load value.
RNS-M3-001-0-p22: At the appropriate time during the cooldown, the operator will initiate the draindown by placing the CVS letdown control valve into " refueling draindown" mode. At this time the makeup pumps will be turned off and the letdown flow control valve will control the drain rate to the WLS. The drain rate will proceea at an initial maximum rate of 100 gpm down to a drain rate of 20 gpm once the level in dic RCS is to the top of the hot leg. The letdown flow control valve as well as the letdown line containment isolation valve will receive a signal to automatically close once the appropriate level is attained. Furthermore, alarms will actuate in the MCR if the level continues to drop so that the operator would be alerted to manually initiate isolation of the letdown line.
H.2. Means Design Envelope and Nominal Conditions H.2.1. RCS Boron Control Later.
H.2.2. RCS Coolant Chemistry Control Later.
H.2.3. RCS Mass Inventory A graph of the maximum flow capacity versus the RCS pressure for the basic configuration of the means, i.e. the modulating valve is fully open and with the demineralizers and the filters clean AP660 0: OC5-M3CM1 uuo a: u u o-os a l Rn B Rn a WP Masur Doc & Time :RCSMASSMD January 13.199413.26 NE Page - 75 e
g AP l FOR INFORMATION ONLY i
d l i l Define on the above graph, the working domain, minimum and maximum flow and the nominal operating point.
H.2.4. RCS Pressure Control Later.
H.2.5. RCS Temperature Control H.3. Means Essential Data 1
Data Instrument Function I Boron Concentration None RCS Boron Control Flow CVS-FID01 RCS Mass Inventory None RCS Pressure Control Temperature None RCS Temperature Control -
H.4. Ejection Points
- H.4.1. CLIA H.5. Means Transports H.5.1. Motive Forces The motive force is provided by the pressure difference between the RCS pressure and the sink pressure.
H.5.2. Valves CVS-V001/2: Letdown Stop Valves
. CVS-M3-001-0-p35: These NO, motor-operated, gate valves are located inside the containment and close automatically on a low-low level signal from the PRZ level control system to prevent uncovering of the heater elements in the PRZ.
The valve fails as is, and manual control (open/ auto /close) is provided on the MCR.
i CVS-V030A: Cation Bed Demineralizer Isolation Valve
- Arnoo a: ocsuscai aa, a we uaw ou a tw : acsurssxo sauay n, iou n:n uuoa: uko nas arv s Page769 O
AP is FOR INFORMATION ONLY I I N
CVS-M3-001-0-p35: (NC), air-operated valve is opened to permit letdown flow i through the cation bed demineralizer, and manually positioned at the MCR.
CVS-V030B: Cation Bed Demineralizer Bypass Valve l
CVS-M3-001-0-p35: (NO), air-operated valve. This valve is manually closed i from the MCR after CVS-V030A is opened to direct letdown flow through the cation bed demineralizer. The valve is manually positioned from the MCR.
CVS V045: Letdown Flow Inside Containment Isolation Valve CVS-M3-001-0-p35: This NC, FC, air operated globe valve is located inside reactor containment and isolates letdown from the WLS. This valve is
' automatically opened by the PRZ level control system on high PRZ level; it automatically closes when the PRZ level returns to normal, and also on a high-high-high degasifier level, or a containment isolation signal. This valve ope ator has a flow restricting orifice in the vent line so it will close more slowly than CVS-V047. Manual control is provided on the MCR.
CVS-V047: Letdown Flow Outside Containment Isolation Valve
. CVS-M3-001-0-p19: controls the letdown flowrate. -
CVS-M3-001-0-p36: This NC, FC, instrument actuated air-operated globe valve is located outside reactor containment and isolates letdown from the WLS. This l valve operates in the same fashion as CVS-V045; however CVS-V047 will close more ouickly than CVS-V045 in order to limit seat wear of CVS-V045. This valve operator has a flow restrictir.g orifice in the air line so it will open more slowly than CVS-V045. In addition, during brief periods of shutdown when the RCS is water solid, this valve throttles to maintain the RCS pressure. 'lhis valve will close on a containment isolation signal.
. CVS M3-0-p65: The letdown orifice isolation valves (CVS-V045, CVS-V047) are used to isolate letdown flow to the Liquid Radwaste System. These valves are automatically opened on a high pressurizer level. They will automatically close on a containment isolation signal, High-high-high degasifier level, or a low pressurizer level. Manual control is provided from the main control panel.
l l CVS-V079:
CVS V084: Aux Spray Line Isolation Valve
. CVS-M3-001-0-p36: (NC, FC) air-operated stop check valve isolates the aux spray line to the PRZ. This valve is operated from the MCR.
l 4D AP600 c: OC5-M3CM) Rn B WP unw Doc & Tusse : RCSuASSMD Janary 13,199413:26 >
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AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY EP d E H.5.3. Other Components CVS-ME01 Regenerative HX
. See "CVS Makeup IN".
. CVS-M3-001-0-p55: The tubes normally contain untreated reactor coolant, with a significant amount of N16.
CVS ME02 Letdown HX CVS-M3-001-0-p30: The HX is designed to cool the purification loop flow from the regenerative HX outlet temperature to the desired letdown temperature of 140 'F or less, which will allow the letdown to be processed by the demineralizers while maximizing the thermal efficiency of the CVS. The letdown HX outlet temperature is manually selected by the operator, who must remotely position a (CCW or CCS ?) flow control valve. Automatic control is not provided.
CVS-Q: Why is it not automatic ?
. CVS-M3-001-0-p54: The tubes normally contain untreated reactor coolant, with a significant amount of N16.
CVS-MV01A/B: Mixed Bed Demineralizers CVS-M3-001-0-p26: The temperature of the coolant entering the demineralizers should not exceed 150 'F.
CVS-Q: The resin imposes a temperature limit. Why ? and why there is no bypass in case of a CCW malfunction ?
CVS A: It is the designer intent to isolate the purifLation inflow when the temperature is too high by closing the valve CVS-V002.
CVS M3-001-0-p33: 2 flushable mixed bed demineralizers are provided in the purification loop to maintain reactor coolant purity. A mixture of lithiated cation and anion resin is used in the demineralizer. Both forms of resin remove fission and corrosion products. The resin bed size is chosen to provide a decontamination factor of at least 10, and normally 100, for most fission products. Each demineralizer is sized to accept the full purification flow during normal plant operation and to have a minimum design life of one core evele.
CVS-M3-001-0-p57: Each demineralizer is sized to provide operation through a fuel cycle without changing resin. Exhausted resin beds will be changed during plant shutdowns, when the purification loop is below 150 psig and the containment access to the manual valves involved is possible.
I WP -
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AP600 RCS Mass Inventory - Function-Based Task Analysis l FOR INFORMATION ONLY P
i I . CVS-M3-001-0-p70: During shutdown, DWS is used to flush the demineralizers. j CVS-M3-001-0-p78: Each mixed bed demineralizer is sized to provide operation through a fuel cycle without changing resin. Two demineralizers are provided and only 1 is in service at any time.
l A demineralizer bed is exhausted when it no longer provides an adequate purification capability, as detected by comparing samples taken from the RCS to samples taken from downstream of the reactor filter. An exhausted resin bed can be changed during plant shutdowns, when the purification loop is at relatively low pressure and the containment access to the manual valves involved is possible.
. CVS-M3-001-0-pD7: Resin volume = 50 ft' and vessel volume = 67 ft'.
CVS-MV02: Cation Bed Demineraliz.er
. CVS-M3-001-0-p32: One flushable cation resin bed is located downstream of the mixed bed demineralizers and is used intermittently to control the concentration.
of lithium 7 (pH control) in the RCS. The demineralizer is sized to accommodate maximum purification flow when in service, which is more than adequate to control the lithium 7 and/or cesium concentration in the reactor s coolant.
. CVS-M3-001-0-p70: During shutdown, DWS is used to flush the demineralizers.
. CVS-M3-001-0-p57: The demineralizer is sized to operate throughout several fuel cycles without changing resin; depending on the fuel conditions, it is expected that this resin will be changed based on age rather than exhaustion. The demineralizer operates only intermittently.
. CVS-M3-001-0-p78: Samples must be compared with the cation bed in and out of service in onder to separate its performance from that of the mixed bed demineralizers.
. CVS-M3-001-0-pD7: Resin volume = 50 ft' and vessel volume = 67 ft'.
CVS-R01: Letdown Orifice
. CVS-M3-001-0-p12: Is used to depressurize the letdown flow.
s
. CVS-M3-001-0-pl9: Following a startup venting operation. CVS-ROI is bypassed by CVS-V043 (LOA).
A?6l0 0: OC5 u]CM1 Rev B WP uamt Doc & Terw : RCSuASSMD January 13.199413.26 tuus uuo a: u u o.03 a 1 Ra,a Page - 79
t -
AP600 RCS Mass Inventory - Function-Based Task Analysis t
FOR INFORMATION ONLY c
CVS S01A/B: Reactor Coolant Filters E I CVS-M3-001-0-p33: The filters are designed to collect resin fines and particulate matter larger than 25 microns from the purification stream. Each filter is designed to accept maximum makeup flow.
I CVS-M3-001-0-p75: Monitor dP with the installed gages and change the filter cartridges or switch to the backup filter when the pressure drop reaches 20 psi.
1 H.5.4. Instruments CVS-FT001 (or CVS-FIA01 ?): Letdown Flow CVS-M3-001-0-p62: The normal letdown flow is 100 gpm and the maximum
- letdown flow during shutdowns is (LATER) gpm. The flow indication and a high flow alann indicating unusually high flow rates is provided in MCR.
CVS-FT025: Purification Loop Return Flow
~
CVS-M3-001-0-p63: Measures the purification loop flow returning to RCS plus any makeup flow. Flow indication in MCR.
CVS-PDIS010: Demineralizer Differential Pressure i
. CVS-M3-001-0-p60: Iniicates the dP across the mixed bed AND cation bed i demineralizer. A high and a high-high dP alarm.s are provided in MCR and local indication is provided at the demineralizer by a pressure indicating switch
- (PDIS-10 ?). A "HI" alarm serpoint will be set to correspond to high dP across a mixed bed, and a "HI-HI" will be set to correspond to high dP acmss a cation bed PLUS a mixed bed operating in series, i . A dP reading specific to the mixed bed QR_. the cation bed is possible by correct valves (CVS-V030A/B ) alignment.
CVS PDIS020: Reactor Coolant Filter Differential Pressure
. CVS-M3-001-0-p61: This local indicator shows the dP across the reactor filters and provides the input to a high dP alarm in MCR.
CVS PT040: Letdown Flow to WLS Degasifier Pressure
. CVS-M3-001-0-p61: This channel measures the pressure of the letdown flow at a point downstream of the letdown orifice. During normal operation this channel is not used. This pressure channel is used to control the RCS pressure during mAP600 0: OC5N3C401 Rn B WP Manor Doc & Twee : RCSMASSMD January 13.199413:26 Mk uuD 0: uuo 93401 ana Page - 80
FOR INFORMATION ONLY j y N cold shutdown water solid operation. A pressure indicator and a high pressure alarm are provided on the main control panel.
.I l
l CVS RE003 (or CVS RIO3 ?): Letdown Radiation l CVS-M3-001-0-p64: Indication in MCR. High activity would be an indication of l problems in the RCS, such as failed fuel.
1 CVS TE002 (or CVS-TICA02): Letdown HX Outlet Temperature CVS M3-001-0 p63: This temperature sensor provides input to the CCW controller which reguir.es the CCW flow through the letdown HX to maintain the desired letdown '.emperature. Temperature indication and a high temperature alarm in MCR. A high-high letdown temperature closes letdown stop valve CVS-V002.
H.5.5. Analytical Instrumentation Checking i
Later. .
H.6. Means Automations H.6.1. Letdown Control See CVS-V001, V002, V045 and V047.
H.7. Sinks H.7.1. WLS
. CVS-M3-001-0-p61: During normal operation this channel is not used. This pressure channel is used to control RCS pressure during cold shutdown water solid operation. A pressure indicator and a high pressure alarm are provided in MCR.
. CVS M3-001-0-p69: If radiogas removal were to be required during nonaal power operation because of fuel defects, the CVS letdown flow would be routed outside of the containment through the WLS degasifier to one of the WLS holdup tanks and then retumed to the RCS through the CVS makeup pumps (CVS-MP01A/B).
. CVS M3-001-0-pal-3: CVS provides the capacity to receive up to (LATER) gallons of RCS fluid during startup from refueling shutdown in (LATER) hours 4 % a: ocs u3cas naa wr uaw ox a ru : Rcsurssato my is, tou n:n %
uuo a: uuo-osas naa Page - 81
a
. l AP600 RCS Mass Inventory - Function Based Task Analysis FOR INFORMATION ONLY P I I 1 !
at (LATER) ppm average boron concentration, once per 18 months.
CVS-M3-001-0-pal-3: CVS provides the capacity for removing (LATER) gallons of RCS fluid in (LATER) hours at a (LATER) ppm average boron l concentmtion, with a frequency of (LATER) during boration to cold shutdown. '
CVS-M3-001-0 pal-3: CVS provides the capacity for removing (LATER) !
gallons of RCS fluid in (LATER) hours at a (LATER) ppm average boron l
concentration, with a frequency of (LATER) durine startup from cold shutdown.
I CVS-M3-001-0-pal 3: CVS provides the capacity for removing (LATER) !
gallons of RCS fluid in (LATER) hours at a (LATER) ppm average boron !
concentration, with a frequency of (LATER) durine operations to borate to !
refueling shutdown. ,
CVS-M3-001-0-pal-3: CVS provides the capacity for removing (LATER) gallons of RCS fluid in (LATER) hours at a (LATER) ppm average boron concentration, with a frequency of (LATER) durine dilution operations to compensate for core burnuo. -
i H.8. Potential Secondary Sinks H.8.1. WSS: Solid Radwaste System :
I CVS-M3-001-0-p71: The resin is sent to the WSS during flushing of the
{
demineralizers. This operation is performed every fuel cycle and potentially 2 "
demineralizers will be flushed at a time.
l H.8.2. PSS !
H.83. RCP motor can !
H.9. Side-Effects Later.
i H.10. Means Alignments Later.
ep ArtWO c: OCS-M3CMI Rev B WP Msw Doc & rew : RCSMMShtD Janary 13,199413.26 M>
MMD c: MMD-93M] Rev s Page - 82
I i,
FOR INFORMATION ONLY
, Y Reactor Vessel Head Vent I.1. Means Design Bases i
l l
RCS-M3-001-0-pl8: To drain the RCS when the refueling water level
! instrumentation indicates that the coolant has been drained below the RV Head vent, the RV Head is vented. Draining then continues until the water level is below the I
RV Flange. The RV Head is raised as the refueling canal is flooded.
Used for venting after RV Head closure during refilling in conjunction with intermittent RCP operation to assist in the venting'(!! RCP NPSH).
- I.2. Means Design Envelope and Nominal Conditions
I.2.2. RCS Coolant Chemistry Control
- Later. -
, I.2.3. RCS Mass Inventory Later.
I.2.4. RCS Pressure Control Later, s
I.2.5. RCS Temperature Control
- Later.
enum i
i j
49 P
AP600 0: OCS u1C401 Rn B WP uame Doc & rime : RCSMASSMD Janwy 13.199413:26 uno 0: uuo-ossos ana Page - 83
FOR INFORMATION ONLY l I s I
l [.3. Means Essential Data Data Instrument Function Boron Concentration RCS Boron Control Flow RCS Mass Inventory RCS Pressure Control Temperature RCS Temperature Control I.4. Ejection Points I.4.1. RCS-V006A/B Vacuum breakers (air intake) when the draining induces a depression in the RV Head. (draindown).
I.4.2. RV Head During filling when the air is vented. l I.43. PRZ I.S. Means Transports I.5.1. Motive Forces Later.
I.5.2. Valves RCS-152 5
RCS-153 I.53. Other Components None.
I.5.4. Instruments l
P AP600 c: OC5-M3CM) Revs WP Masser Doc & Tew : RCSMAsSMO Janwy 13.199415:26 hp MMD c: MMD-03M1 Revs Page - 84
1
' ~
l AP600 RCS Mass Inventory - Function Based Task Analysis FOR INFORMATION ONLY l
{ P RCS LG120
. with LOAs RCS-V204/205.
RCS M6-002-6: Note 17: Sight glass provided for venting and filling the PRZ. l RCS LG130 l
RCS-M6-002-6: Note 11: Sight glass provided for venting and filling the RV.
Locate above RVH elevation. l l
RCS-TE158 RCS TE159 I.5.5. AnalyticalInstrumentation Checking Later.
I.6. Means Automations Later.
~
I.7. Sinks I.7.1. Cntainment RCS LG130 is used to locally monitor the water level.
I.8. Potential Secondary Sinks Later.
I.9. Side-Effects Later.
I.10. Means Alignment later.
@ < }
r AP600 c: OCS M3C 001 Re, B Wl' Masur Doc & Time : RCSMASSMD Janary 13.199413:26 MMD c: MMD-93M1 Re, B Page - 85
i -
AP600 RCS Mass Inventory - Function Based Task Analysis FOR INFORMATION ONLY IWP J. PRHR Vent i
J.1. Means Design Bases DCP-91-045/0 p24: A high point vent provides the capability to detect and vent noncondensible gases from the PRHR piping. This is an EPRI requirement and a stated NRC concem. This vent arrangement consistes of the following:
. Short section of 10" piping to collect any noncondensibles.
. Redundant level detectors at same elevation to alram when RCS water displaced. ,
. 2 series of manually operated 3/4" valves to vent noncondensibles to the IRWST (with standard 3/8" orifice connection).
At normal RCS temperatures and pressures, the RCS noncondensible gas concentration is well below the gas solubility limit and collection of noncondensible gases is anticipated. In addition, the RCS flow is sufficient to sweep gases out of the top of the SG U-tubes. During startup, noncondensible gases can bc present in the PRHR HX if it is not properly vented. In this case, a high point vent for the PRHR ~
piping would be needed to allow manual venting of the RCS.
The high point vent pipe stub will use level switches to detect voiding and actuatg an alarm in the MCR. The operators would then have to manually vent the RCS. Since venting is not expected to be required during operation, the vent valves are not remotely operated. They have reach rods with biological shielding to protect the operators, in the unlikely event that it is necessary during plant operation.
J.2. Means Design Envelope and Nominal Conditions J.2.1. RCS Baron Control Later.
J.2.2. RCS Coolant Chemistry Control Later.
J.2.3. RCS Mass Inventory Later.
J.2.4. RCS Pressure Control 4 un*
AP600 c: OCS M3C401 Rev s WP Mwer Doc & Timt : RcSMASSMD Jamay 13,199413:26 MMD 0: MMD 93401 Re, s Page - 86
g AP600 RCS Mass Inventory - Function Based Task Analysis
- FOR INFORMATION ONLY Later.
J.2.5. RCS Temperature Control Later.
j j J3. Means Essential Data Data Instrument Function Boron Concentration RCS Boron Control Flow RCS Mass Inventory
- J.4. Ejection Points .
J.4.1. H L1 1
l J.5. Means Transports J.S.I. Motive Forces 1
J.5.2. Valves LOA Valves PXS-Vill A/B (NC).
1 J.53. Other Components l Later.
J.5.4. Instruments PXS.LS061/2
. Level limit switches .
J.5.5. Analytical Instrumentation Checking t
A?600 c: OC5-u]CM1 RnB WP Nasser Dec & Tew : RCSuASSMD Janwy 13.199415:26 uno a: uuo.93m1 Rna Page - 87
1 1 ,
j AP600 RCS Mass Inventory Function-Based Task Analysis t
FOR INFORMATION ONLY 1
i i
J.6. Means Automations None.
j J.7. Sinks 4
J.7.1. IRWST i Later.
4 j J.8. Potential Secondary Sinks
{
Later.
j j J.9. Side-Effects l -
l umr.
i i
J.10. Means Alignment '
g L&tcr.
e t
i 4
l l
l i
4 i
i i AP600 0: OCS-u1CMI Re, B WP uaner Doc & Th : RCSuASSMD Jawy 13,19M 13:26 i uuo a: u u o-o3 m l Rev o Page - 88 i,
ngo , 7 , , - ,,, - - - - -
l Ai600 RCS Mass inventory - Function Based Task Analysis FOR INFORMATION ONLY i P K. 1st,2nd and 3rd Stage ADS Mass Flow OUT K.1. Means Design Bases PXS-M3C-004-1-pl:
ADS Serpoints CMT Volume (%)
1st 75 2nd 65 3rd 50 46 20 RCS-M3-001-0-p29: The automatic depressurization valves are provided primarily for post-accident RCS depressurization. They are not required to mitigate RCS overpressure transients occurring during normal power operation or as part of a cold-overpressure mitigation system (COMS). They are available, however, for use in connection with loss of heat sink events (feed and bleed) and plant shutdown operations.
REF 7:The depressurization of the RCS is staged to limit the depressurization rate and the max vent flow from the PRZ to the spargers.
RCS-M3-001-0-p17: Used to vent the PRZ for RCS draining.
RCS-Q: Which stage is specifically usedfor PRZ venting ?
RCS A: Thefirst stage will be used, but any of the 3 stage would be suitable, PXS-M3-001-0-p2: An activity barrier is lost in case of ADS actuation.
RCS-M3-001-0.p28: The ADS valves receive power and actuation signals from 4 independent battery / protection sets.
PXS-M3-001-0-p29: The automatic depressurization valves are designed to automatically open when actuated and to remain open for the duration of any automatic depressunzation event.
RCS-M3-001-0-pal-2: Supported by IDS for testing and post accident.
RCS-M3-001-0-p29: In addition to automatic operation, the RCS depressurization valves can be operated manually from MCR.
ED AP600 0: oCs M3C.001 Revs WP Master Doc A rme : RCsMAss.MD January !3.199415:26 O u uo a: uuD o3 sol Rev s Page 89
AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY RCS-M3-001-0-p30: The ADS valves are designed to open slowly, from 20 see to 100 sec, based on the valve size and operator.
K.2. Means Design Envelope and Nominal Conditions K.2.1. RCS Boron Control Later.
K.2.2. RCS Coolant Chemistry Control l l
Later.
K.2.3. RCS Mass Inventory Later.
K.2.4. RCS Pressure Control .
Later.
K.2.5. RCS Temperature Control Later.
K.3. Means Essential Data i
I Data Instrument Function j Boron Concentation Sample RCS Boron Control Level RCS Mass Inventory l RCS Pressure Control l
Temperatum RCS Temperature Control K.4. Ejection Points K.4.1. Top of PRZ ,
K.S. Means Transports APsoo a: ocs.uscMi Re B WP Masur Doc & Teu : RCSMASSMD Jawy 13.1M JH6
- NMDa: MMD-93Mi Rns Page - 90
AP600 RCS Mass Inventory - Functioa-Based Task Analysis FOR INFORMATION ONLY q P I I X.5.1. Motive Forces The motive force is provided by the pressure difference between the PRZ pressure and the pressure at the spargers.
K.5.2. Valves RCS M3-001-0-p281st para: "The valves receive power and actuation signals from 4 independent battery / protection sets.
RCS-M3-001-0-p29: To minimize steam leakage during normal power operation, the piping to each set of 2 valves in series connected to the PRZ is arranged to provide a cold water seal at the inlet of the 1st valve.
RCS-TE172/3/4 & TE177/8/9 could give a leak indication if the flow leak is sufficient.
PXS-M3-001 pal-1: IDS provides class 1E DC to the 1st,2nd,3rd stage valves.
PXS-M3-001-pal-1: ADS valves have hardwired switches in the MCR.
DCP-91-045/0 pl3: The ADS valves will be periodically tested (on a quarterly basis) to verify operability by cycling the valve open and then shut. During this test, the valves could experience significant differential pressures across the seat, which can potentially cause seat damage as a result of the testing.
To preclude damaging the seats, individual test lines will be installed around each ADS valve with a remotely operated solenoid valve that can be opened immediately prior to cycling the valve. This will eliminate any differential pressure across the valve seat prior to the operability testing.
RCS V007A/B & C/D,3/4" BBB L271A/B.
RCS V001A/B, RCS V001C/D: 1st Stage Valves RCS-M3-001-0-p28: Open on coincidence of the CMT actuation signal and the CMT 1.ow-l level setpoint.
PXS-M3-001-0-p29: During events where ADS is not actuated, the operators can throttle the 1st stage valves to perform limited depressurization of the RCS in a slow, controlled fashion.
RCS-V002A/B, RCS-V002C/D: 2nd Stage Valves
- RCS-M3-001-0-p28: Open following a 60 see time delay after occurrence of the Areoo : ocs.usc oor aa, s wr uaar ox a ra :acsurssxo jam n.tou n:n U uuo u: uuo 93-oot nav a Page - 91
1 FOR INFORMATION ONLY first depressurization signal, when CMT level falls below the Low-2 level setpoint.
RCS-V003A/B, RCS V003C/D: 3rd Stage Valves RCS-M3-001-0-p28: Open following a 60 see time delay after occurrence of the second depressurization signal, when CMT level falls below the Low 3 level ,
setpoint.
K.5.3. Other Components None.
l K.5.4. Instruments '
RCS-TE172 RCS TE173 l
RCS-TE174 l
RCS-TE177 '
t RCS-TE178 )
RCS TE179 K.5.5. Analytical Instrumentation Checking Later.
K.6. Means Automations Later.
1 K.7. Sinks ,
K.7.1. IRWST l Later.
K.7.2. Containment (IRWST vaporization) 151> We*
AP600 c: OCS M3CM) Rev B WP Masser Doc & Tew : RCSMASSMO January 13,199413:26 uuo o: uuo-o3a1 Rev s Page - 92
600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY EE Later.
K.8. Potential Secondary Sinks K.8.1. RCDT RCS M3-001-0-pal-3: WLS receives and process mactor coolant leakage through the PRZ safety valves and ADS valves (seat leakage). This leakage accumulates in the collection pots on the bottom of the ADS valve discharge headers.
RCS-V241:
RCS-M6-002-6: Close on "S" signal or RCDT HI pressure.
K.9. Side-Effects Later.
K.10. Means Alignment -
Later.
AP600 c: OCS M]CMi Rn s WP Mstur Doc & Time : RCSMASSMD Janay 13,199413:26 uno a: u M o.93 a l na a Page - 93
AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY am 4 5 L. 4th Stage ADS Mass Flow OUT L.I. Means Design Bases See "Ist,2nd and 3rd Stage ADS Mass Flow OUT'.
L.2. Means Design Envelope and Nominal Conditions L.2.1. RCS Boron Control Later.
L.2.2. RCS Coolant Chemistry Control Later.
L.23. RCS Mass Inventory Later.
L.2.4. RCS Pressure Control Later.
L.2.5. RCS Temperature Control Later.
L3. Means Essential Data Data Instrument Function Boron Concentration RCS Bomn Control Flow RCS Mass Inventorf RCS Pressure Control Temperature RCS Temperature Control L.4. Ejection Points AP600c: OCS-u]CM) Rev s WP waster Doc & Tune : RCSMASSMD January 13,199413.26
%F uno a: uuD-nal Re, s Page - 94
AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY l l P
{
L.4.1. Hot leg loop 1 for RCS-V004A/B L.4.2. Hot leg loop 2 for RCS-V004C/D L.5. Means Transports L.5.1. Motive Forces The motive force is provided by the pressure difference between the HL1 or HL2 pressure and the containment pressure L.5.2. Valves RCS-V004A/B, RCS-V004C/D: 4th Stage ADS Valves.
1 RCS-M3-001-0-p28: Open following a 60 see time delay after occurrence of the l
third depressurization signal, when CMT level falls below the Low-4 level serpoint. l Supported by CAS (RCS-M3-001-0-pal-1: not required for post-accident).
PXS-M3-001-pal-1: EDS provides control power to the solenoid operators on AOVs.
RCS-M3-001-0-p281st para: "The valves receive power and actuation signals from 4 independent battery / protection sets.
PXS-M3-001-pal-1: ADS valves have hardwired switches in the MCR.
L.53. Other Components Later.
L.5.4. Instruments Later.
L.5.5. AnalyticalInstrumentation Checking Later.
L.6. Means Automations e&AP600 0: OCS-M3CMI Rn B WP Masur Doc & Tew : RCSMASSMD January 13,1994 )$16 uuo a: u u o-93 a ! Rn a Pag %Q e-93
- a. .
AP600 RCS Mass Inventory - uncnon Based Task Analysis FOR INFORMATION ONLY l
@ Later.
L.7. Sinks L.7.1. Containment => sump L.8. Potential Secondary Sinks None.
L.9. Side-Effects Later.
L.10. Means Alignment Later.
Ib ~
AN00 c: OC5.M3C401 Rn B WP usner Doc & Tmr :RCSMASSMD Jamsry 13,199413:26 uuo a: uun-ossol Rn s Page - 96
\
a .
FOR INFORMATION ONLY I k. PRZ dafety Valves Mass Flow OUT M.I. Means Design Bases RCS-M3-001-0-p27: The combined rated capacity of the valves is equal to or greater than the maximum surge rate resulting from complete loss of load without immediate reactor trip or any other control.
l This actuation is to be avoided as much as possible because the containment flooding and contamination.
1 I
' RCS M3-001-0-p27: A short length of piping fitted with a mpture disc is attached to l
the discharge flange of each safety valve to provide a closed volume (discharge I
- chamber) in which valve leakage may cool and condense. These volumes drain 5
continuously through smalllines to the RCS depressurization valves discharge header.
)
CVS-TE171/6 could provide a leak indication if the leak flow is sufficient.
M.2. Means Design Envelope and Nominal Conditions M.2.1. RCS Boron Control Later.
M.2.2. RCS Coolant Chemistry Control Later.
M.23. RCS Mass Inventory Later.
M.2.4. RCS Pressure Control Later.
M.2.5. RCS Temperature Control Later.
M3. Means Essential Data 4p>
AP600 e: OCS u)CMI Rn a WP Muur Doc 1 Tueu : RCSMAssMD hnmary I3,199413:26 W*
uuo a: uuo nal Rea Page - 97
I s.
s FOR INFORMATION ONLY :
l 1 P i P l Data Instrument Function Boron Concentration RCS Boron Control Flow RCS Mass Inventory RCS Pressure Control Temperature RCS Temperature Control M.4. Ejection Points M.4.1. Top of PRZ l M.S. Means Transports 1
M.5.1. Motive Forces The motive force is provided by pressure difference between the PRZ pressure and the safety valve serpoint pressure and the containment pressure.
l M.5.2. Valves , l l
RCS-V005A/B
. RCS-M3-001-0-p27:
. Nominal serpoint = 2485 psig,
. Open/close indicator in MCR.
RCS-V241
. RCS-M6-002-6: Close on "S" signal or RCDT HI pressure.
M.5.3. 'Other Components RCS K03/04
. RCS-M3-001-0-p27: The design pressure of the discharge chambers is 500 psig l (same as the depressurization valve discharge lines), and the nominal rupture disc burst pressure is set at 500 psig. Since the backpressure developed in the depressurization valve discharge header by valve operation will be less than 500 psig, these rupture discs should not be affected by depressurization valve
! +
' %uuoa: a:
ocs.uscar uuo nas saa an a wr uaw ox a rm :acsurssao s.um n. im nas MF yage - 98
h AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY operation.
M.S.4. Instruments Later.
M.5.5. Analytical Instrumentation Checking Later.
M.6. Means Automations None.
M.7. Sinks M.7.1. Containment The PRZ outlets are not piped to limit the PRZ safety valve back pressure. Outlet piping to IRWST, RCS loop compartments or RV sumps have to much negative effect on the safety valve back pressure and are therefore avoided for safety. ,
M.8. Potential Secondary Sinks M.8.1. IRWST spargers very little because the 3/4" EBC LO65A/B line for leak flow.
M.8.2. WLS RCDT
- very little because the 3/4" EBC LO65 A/B line for leak flow.
RCS-M3-001-0-pal-3: WLS receives and process reactor coolant leakage through the PRZ safety valves and ADS valves (seat leakage). This leakage accumulates in the collection pots an the bottom of the ADS valve discharge headers.
M.9. Side-Effects Later.
M.10. Means Alignment Later.
&uuoa:a: ocsuscas uuo nas na a na a wr u=w ooc a r,~ : acsuAssxo w y n. nu n:u Page - 99
.l
w I
AP600 RCS Mass Inventory - Function-Based Task Analysis j
FOR INFORMATION ONLY l
ANNEXES i
LIST OF AP600 SYSTEMS !
, ASS Auxiliary Steam Supply System BDS Steam Generator Blowdown System CAS Compressed a i Instrumentation Air System CCS Component Cooling Water System CDS Condensate System Condenser Tube Cleaning System CES l
, CFS Turbine Island Chemical Feed System l CLS Circulating and Service Water Chemical Injection System CMS Condenser Air Removal system CNS Containment System CPS Condensate Polishing System l CTS Cooling Tower System CVS Chemical and Volume Control System CWS Circulating Water System DAS Diverse Actuation System DCS Security Lighting System ~
DDS Data Display and Processing System DOS Standby Diesel and Auxiliary Boiler Fuel Oil System DRS Storm Drain System DTS Demineralized Water Treatment System DWS Demineralized Water Transfer and Storage System ECS Main AC Power System EDS Non Class 1E DC and UPS System EFS Communication Systems EGS Grounding and Lightning Protection System EMS Special Process Heat Tracing System l ELS Plant Lightning System EOS Cathodic Protection System FDS Fire-Smoke Detection and Alarm System FHS Fuel Handling and Refueling System FPS Fire Protection System FWS Main and Startup Feedwater System GSS Gland Seal System HCS Generator Hydrogen and CO2 Systems HDS Heater Drain System HSS Hydrogen Seal Oil System IDS Class 1E DC and UPS System IIS Incore Instrumentation System LOS Main Turbine and Generator Lube Oil System MES Meteorological and Environmental Monitoring System MHS Mechanical Handling System MSS Main Steam System MTS Main Turbine System OCS Operation and Control Centers l PCS Passive Containment Cooling System l e )
AP600 0: OC5-M3C.001 Rn B WP Mamr Doc & Tmw : RCSMASSMD Janary 13,199413:26 uuo a: xuo.9sool Ra a Page - 100 i
- - i AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY PGS Plant Gas Systems PLS Plant Control System PMS Protection and Safety Monitoring System PSS Primary Sampling System PWS Potable Water System PXS Passive Core Cooling system RCS Reactor Coolant System RDS Gravity and Roof Drain Collection System RMS Radiation Monitoring System RNS Normal Residual Heat Removal System RWS Raw Water System RXS Reactor System SCS Stator Cooling System SDS Sanitary Drainage System SES Plant Security System SFS Spent Fuel Pit Cooling System SGS Steam Generator System SJS Seismic Instrumentation system SMS Special Monitoring System SSS Secondary Sampling System i SWS Service Water System l TCS Turbine Building Closed Cooling Water System .
TDS Turbine Island Vents, Drains and Relief System TOS Main Turbine Control and Diagnostics System TVS Closed Circuit TV System .
VAS Radiologically Controlled Area Ventilation System VBS Nuclear Island Nonradioactive Ventilation System VCS Containment Recirculation Cooling System VES Main Control Room Emergency Habitability System VFS Containment Air Filtration System VHS Health Physics and Hot Machine Shop HVAC System VLS Containment Hydrogen Control System VPS Pump House Building Ventilation System VRS Radwaste Building HVAC System VTS Turbine Building Ventilation System VUS Containment Leak Rate Test Systems VWS Central Chilled Water System VXS Annex / Aux Building Nonradioactive Ventilation System VYS Hot Water Heating System VZS Diesel Generator Building Ventilation System WGS Gaseous Radwaste System WLS Liquid Radwaste System WRS Radioactive Waste Drain System WSS Solid Radwaste System WWS Waste Water System ZAS M Generation System ZBS
- 3 mission Switchyard and Offsite Power System ZOS L-oite Standby Power System ZVS Excitation and Voltage Regulation System A?600 R: OC5-M3C401 RevB WP us.tur Doc & Time :RCSuASSMD January 13,199415:26 uuD s: uuD-osso! arv s Page 101
% O
'~
AP600 RCS Mass Inventory - Function-Based Task Analysis FOR INFORMATION ONLY LIST OF ACRONYMS ADS Automatic Depressurization Valves AOV Air Operated Valve CL Col Leg CMT Core Makeup Tank DC Direct Current DCP Design Change Proposal dP Differential Pressure DVI Direct Vessel Injection ECR Emergency Control Room FC Fail Closed FO Fail Open HL Hot Leg HVAC Heating, Ventilating and Air Conditioning HX Heat Exchanger ID Identification IRWST In-containment Refueling Water Storage Tank LC Locked Closed LO Locked Open LOA Local Operator Action .
LOCA Loss Of Coolant Accident LOOP ' Loss Of Offsite Power LTOP Low Temperature Overpressure Protection MCR Main Control Room. ,
M-MIS Man Machine Interface Systems MOV Motor Operated Valve NC Normally Closed NO Normally Open NPSH Net Positive Suction Head )
ORE Occupational Radiation Exposure I P Pressure PBOT Pressure at the Bottom of the tank P&ID Piping and Instrumentation Diagram ppm Part Per Million PRHR HX Passive Residual Heat Removal Heat Exchanger PRZ Pressurizer PTOP Pressure at the top of the tank ,
PWR Pressurized Water Reactor )
RCDT Reactor Coolant Drain Tank RCP Reactor Coolant Pump RER Residual Heat Removal RV Reactor Vessel {
RVH Reactor Vessel Head SG Steam Generator i SGTR Steam Generator Tube Rupture SQRT Square Root SSAR AP600 Standard Safety Analysis Report SSD System Specification Document AP600 a: OCS-u]C401 Rn B WP uaner Doc & Time : RCSuASSMD Janwy 13,199413:26 uuo a: uuo-ossos an a Page - 102
Y A1000 RCS Mass Inventory - Function Based Task Analysis FOR INFORMATION ONLY LIST OF REFERENCE DOCUMENTS l
Reference Rev Date Description l I
5D63525 1 11/1161 AP600 Functional Diagram - Pressurizer Pressure and Level Control CNS-M3-001 A 07/31 S 0 Containment System SSD CVS-M3-001 0 01/3162 Chemical and Volume Control System SSD CVS-M3C-002 0 04/10 S 2 CVS Boric Acid Tank Sizing CVS-M3C-003 0 10/19 S 2 CVS Makeup System Performance CVS-M6-001 5 05/15 S 2 Chemical & Volume Control System P&ID CVS-M6-002 5 05/15/92 Chemical & Volume Control System P&ID CVS-M6-001 5 05/15S2 Chemical & Volume Control System P&ID '
CVS-M6-002 5 05/15S2 Chemical & Volume Control System P&ID DAS-J7-001 A 09/30 S 3 Diverse Actuation System SSD DCP-91-045 0 11/12 S 1 PXS Design Changes GW GL-021 0 06/26S 2 Standard Safety Analysis Report GW-G0-001 3 06/28S 3 Plant Description Document MELCO P.I.S.C. 03/28/89 JDP IB Output 2.2: Methodology for Creating Functional Structure MELCO P.I.S.C. 03/28/89 JDP IB Output 2.2: An Example of Using the Functional Structure Methodology (Output 2.2) - RCS Inventory as Example PSS-M3-001 0 01/28B2 Primary Sampling System SSD PSS-M6-001 5 05/08S 2 Primary Sampling System P&ID AP600 0: OCS-M3CMI RnB WP Maar Doc & Me : RC5MA55MD January 13,199413:26 uno a: Muo-osa! Rna Page - 103
n g
s W FOR INFORMATION ONLY PXS-M3-001 0 01/3162 Passive Core Cooling System SSD PXS-M3C-004 1 05/20 S 1 CMT Sizing / Performance PXS-M6-001 5 06/05 S 2 Passive Core Cooling System P&ID PXS-M6-002 5 06/05 S 2 Passive Core Cooling System P&ID PXS-M6-003 5 06/05 S 2 Passive Core Cooling System P&ID PXS-M6-004 5 06/05S2 Passive Core Cooling System P&ID RCS-GSA-001 0 05/29 S 2 Incidents which Result in an Increase in Reactor Coolant Inventory (Ansaldo)
RCS-M3-001 0 01/31 S 2 Reactor Coolant System SSD RCS-M6-001 6 12/21 S 1 Reactor Coolant System P&ID RCS-M6-002 6 12/21S1 Reactor Coolant System P&ID 1
RCS-M6-003 6 12/21 S 1 Reactor Coolant System P&ID .
REGULATORY GUIDE 1.49 May 1973 Design Limits and 1.cading Combinations for Seismic Category 1 Fluid System Components RNS M3-001 0 01/31 S 2 Normal Residual Heat Removal System SSD RNS-M6-001 3 05/11 S 2 Normal Residual Heat Removal System P&ID {
SFS-M3-001 0 01/31 S 2 Spent Fuel Pit Cooling System SSD 1 1
SFS-M6-001 6 05/11 S 2 Spent Fuel Pit Cooling System P&ID !
WGS-M3-001 0 07/02 S 3 Gaseous Radwaste System SSD ,
WGS-M6-001 2 01/02B2 Gaseous Radwaste System P&ID WLS-M3-001 A 08/01S 0 Liquid Radwaste System SSD WLS-M6-001 2 05/18 S 2 Liquid Radwaste System P&ID !
WLS-M6-002 2 05/18 S 2 Liquid Radwaste System P&ID 1
AP600 c: OCS-u3CM) Rev B WP unsur Lw & Time : RCSMASSMD January 13,199413:26 uuo a: u u o-os a l Rev s Page - 104
n i
AP600 RCS Mass Inventory - Function-Based Task Analysis
<> FOR INFORMATION ONLY WLS-M6-003 2 05/18/92 Liquid Radwaste System P&ID WLS-M&OO4 2 05/18/92 Liquid Radwaste System P&ID i
4 4
1 l
l L
AP600 R: OCS-M3CMI Rn B WP Masur Doc & Teu : RCSMASSMD Janwy 13,1994 j$:26 MMD c: MMD-93Mi RnB . pgge , y93