ML20128B998
| ML20128B998 | |
| Person / Time | |
|---|---|
| Site: | 05200001 |
| Issue date: | 01/25/1993 |
| From: | Fox J GENERAL ELECTRIC CO. |
| To: | Poslusny C Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 9302030256 | |
| Download: ML20128B998 (8) | |
Text
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GE Nuclear Enctgy
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January 25,1993 Docket No. STN 52-001 Chet Poslusny, Senior Project Managar Standardization Project Directorate Associate Directorate for Advanced Reactors and License Renewal -
Office of the Nuclear Reactor Regulation
Subject:
Submittal Gupporting Accelerated AIMR lieview Schedule
Dear Chet:
Enclosed are drafts of (1) ABWR Design Document, Motor Operated Valve Design Description; and (2) modified Subsection 3.9.6, in-Service Testing of Pumps and Valves.
Please provide a copy of this transmittal to Ted Sullivan.
Sincerely, H Y Jack Fox Advanced Reactor Programs ec: Jack Duncan (GE)
Norman Fletcher (DOE)
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9302030256 930125 /)
'. ABWR Dasion Document TM 8
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Motor Operated Valvo Design Description The results of tests of active safety related motor-operated valves identified in the figure or design descriptions demonstrate that the MOVs are qualified to perform their safety functions under -
certified design differential pressure, system pressure, fluid temperature, ambient te nperature, minimum voltage, and minimum and/or maximum stroke times.
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' 3JA3.6 Susse, Deformaties, nad Tatisse IJestes he sehty Chas and Other Ranctor 3.94-66. .M Testing of Puseps and Valves latermeas (Emeryt Care Sepywt Structores) in service toating of aafety related pumps and valves will be performed is accordance with For safety class reactor Internals, the stress the requirements of ASME OM Code 1990, Sub. I deformation and fatigue criteria listed In Tables section ISTB, ISTC and Appendix 1. Table 3.9 8 1 3.9 4 through 3.9 7 are based on the criteria lists the in service testing parameters and established in applicable codes and standards for frequencies for the safety related pumps and simuar equipmcat, by me.nufacturers standards, or valves, The reason for each cede defined by emplitcal methods based on field experience testing exception or Juttificaties for each code and testing. For the quantity SF . (minimum exemption request la noted in the description of safety factor) following valuesappearing are used: la th82Ptsoles, the the affected pump or valve. Valves having a containment isolation inaction are also noted in ses dee the listing. In. service inspection is discussed Serece in Subsectica 5.2.4 and 6.6.
LCDs .Cand1112lt b A Normal Details of the in service testing program, 2.25 including test schedules and frequencies will be B Upect 2.25 C
reported in the la. service laspection and Emergency 1.5 D Fauhed testing plan which will be provided by the L125 appucant refetcacing the ABWR deelsts. The plan will latograte the applicabic test requirements Components inside the reactor pressure vessel for safety related pumps and valves lactuding such as control rods which must move during those listed la the technical speelfications accident condition have been examined to (Chapter 16) and the containment liolation determine if adequate clearances exist during system, (Subsection 6.2,4). For stampic, the '
caergency and fanhed conditions. No mechanleal periodic leak testing of the reactor coolant clearance problems have been Identlfled. The pressure isolation valves la Table 3.9 9 will be forcing fonctions applicable to the reactor performed la accordance with Chapter 16 laternals are discussed in Subsectio; 3.9.2.5. Sarveillance Requirement SR 3.6.1.5.10. This plan willlaclude basellas pre service testing The design criteria, losdlas conditions, and to support the periodle in. service testing of analyses that provide the basis for the design of the composants. Depending on the test results, the safety class reactor Intsraals other than the the plan will provide a commitment to cors support structures meet the guidellaes of A-=hla and inspect the safety related pumps NO.3000 and are constructed so as not to and valves when liasits of the OM Code are adversely affect the latogrity of the core excended, as described la the following support stractures (NG.1122). paragraphs. The primary elements of this plan, Iseledlag the regattements of Generic Letter The design requirescats for equipment 89-10 for motor operated valves, are delineated claastfled as aca. safety (other) class laternals la the sabsectless to follow. (See Subsection (e.g., steam dryers and shtond heads) are 3.9.7.3 for COL licenso information specified with appropriate considerstlom of the requiremeats).
latended serv 6es of the egalpmeent and expected plant and envirossnestal candWas under which it 33.g.1 Ja.eeentes, Testing of Sehty Related will operats. Whers Code dealga requirsments ars Pampo not appliesble, accepted ladsatry or engineerlag T.nsari Jk practices are used. JThe ASWR safety rclated pumps and piping N configuradcas accomamodkte la-service testing at Allow rate at least as large as the maximum design flow for the camp. In additle
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i Sandard Plant Aa nv n sizing of each miniana recirculation flow path is experiencs. (See Subsectica 3.9.7.3(1) for COL evaluated to assure that its use under all licenae information requirements.)
analyzed conditions will not result la degradation of the pump. The flow rate through 3.9M.2 Motor Operated YaMe l minimum recirculation flow paths can also be hd C = > l periodically accordance with the measured to verify that flow is la [ specifications ,requi design speeltication.
I I Luv results of either in situ or prototype testi g I
5 The safety.related yumps are provided with with full flow sad pressure or full differential 1 lastrumentation to vudy that the net positive pressure to verify the proper strins med enred awitch settings of the valves.)guidelFast so M',
suction head (NPSH) la greater than er equal to the NPSH required during all modes of pump operation. These pumps can be disaccabled for ,fetify Ocaeric protorgr; Letter 8910, Sup testing arts contained la dement 1. Questions 22 .
evaluation when Subsectico ISTB testing results.t and 24 through 28@c i.6L appucannett6d I in a deviation which falls within the ' required 1proviae a stucy Trustermine the optimal action range.' The Code provides criteria limits 5 frequency for valve stroking during In serv % #{
i for the test parameters identifled in Tablej testing such that unacccuary testing and damage 4 !
3.9 4. A program will be developed by the COLE applicant to establish the frequency and the testing. (Sec Subsectica 3.9.7.3(2) for COL is not done to the valvo as a re cxtent of disassembly and laspection based on gase taformation requirements).f "
l suspected degradation of all safety related pumps, including the basis for the frequency and h; The concerns and issues identified la the extent of each disauembly. The program may Oeceric Letter 8910 for NOVs vill be addresad ~4p3 l
be revised throughout the plant life to minim!xe prior to plant simup.)The metnoe w auesam
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disassembly based on past disassembly fus iosdi, sne meinou of sizing the actuators, experience. (See Subsection 3.93.3(1) for COL f and the settlag of the torque and limit switches lleense Information requirements.) will be spect'ically addressed. (See Subsection 33.6.2 "-- := Teeting of SaSety.Related 3.9.7.3(3) for COL license information L !
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The la service testing of MOVs will rely on 'ur '
3.9M.1 CheckVahn diagnostic techniques that are consistent with b the state of the art and which will permit an All ABWR safety related piping systems anucment of the performance of the valve undar...
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lacorporate provisions for testing to demosstrate actual loading. Periodic testing.pery -- .t the operability of the check valvu ander design -fMC will be conducted under adequate differ. (
conditions. In service testing will lacorporate satial pressure and flow conditloss that allow a the use of advance aca latrusive techniques to justifiable demonstration of continuing MOV periodically assess degradation and the capability for dealsa baals conditions. F [{e performance characteristics of the check valves. A:&&; nn:- y ' : '" " ^ ^ '
T The check $nbsection valves that fall toISTC exhibitteats vHl be the required performed, psnteria, and -W%
and are ' declared MT/efo1: h" &k =
laopstable,'
performance can be disausabled for evaltation, stroka te ta ead Ieakaae eaea e a n_hfJ i The Code provides criteria limits for the test Jilistsambled fer evah=Ha= FThe Code provides y criterla limits for the test enemmerers l parameters ldestified la Table 3.9 8. A programw!!! be developed programsby the COL a willie establish the frequency and the estent of developed by the COL app - to establish the [.
disassembly and laspectica based ca suspected frequency and the extent of disanetb degradation of all safety related pumps, larpection based os suspected degradation of all e including the basis for the (regacacy and the safety related 'MOV'a', includleg the basis for extent of each disassembly. The program may be the frequency and the extent of each {
revised throsghout the plant life to minimirs disecsembly. The program may be revised (*
disassembly based on past disassembly throughost the plant life to minimise P I
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,. ~ .htQvW b Jrer each pump, the design basis-and required opettting conditions?
(including tests) under_which the pump will be required to' function ~will bei
- -established. These design;(design basis and required-operatingt senditions -
include flow rate and corresponding head for each system mode of pump operation and the rsquired operating time for each mode,-acceptable bearing _
vibration lovsis, seismic / dynamic loads,-fluid temperature,gambient' temperature,.-and pump motor minimum voltage.
The licensee will establish the following. design and qualification-requirements and will provide acceptance criteria for these requirementa.
For each sise, ty gpend model the licensee _will perform testing-encompensing cosign conditions that demonstrates acceptable flow rate-and corresponding head, bearing vibration levels, and pump internals wea'r-rates for the operating time specified for occh systee mode of pump-operation. From these tests the licensee will also develop baseline (reference) hydraulic and vibration data for evaluating the acceptability? -j of the pump after installation. The licensee will ensure that the sungp wj specifiedforeachapplicationisnotsusceptible-toGroblemsidentiflo4_byy Gpershonal esperlence, suchTinadequate minimum flow rate ana saadequeu thrust beating cepecity. Wetik ra sreef % wentmum gea p.m js ejendra.,
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The ABWR safety-related pumps and piplag '
w.T w. Jess ====Ma*= la servios testleg at ,
a flow rate at lesat as large as the maximum design flow for the pampf O///spf&#,
o For each motor-operated valve assembly (MOV).with an active safety.related_
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function, the design basis and required operating oonditions:(including testing) under which the WCV will be required to pergerm will be establ.ished.
The licensee will establish the followint design _and qualification
' requirements and will' provide acceptanee esiteria for these requirements.
By testing each sist, type,:and model the licen(eet.will determine.the.
torque and thrust (as applicable'to the type of le0V) requiraments'to
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operate the~WOV and will ensure the adequacy ~of the torque and-thrust that.
' the motor-operator:aan deliver-under design (design basis-ant required
-operating) conditions. -These design conditions include' fluid: flow, differential pressure (including pipe break),: system pressure,' fluid temperature, sabient . temperature, minimum' voltage,i and miai== sad maximum 2
stroke-time requirements. lThe licensee will ensure that the structural.
capability.limita of_the individual perts of the leeV vill not be:estooded under design conditions. The' licensee will demonstrate by testing each-sise, type, and model that-torque and thrust requirea.onts from in-situ; testing conditions een be @ rapolate g e design-conditions.;
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will ensure that the valve specified for each application is not susceptible tofffo5isrTTdintif144TyloperatIonal _ experience, suchWF pressure locking and thennal binding.
Inse# 6 The following testing requirements and acceptance criteria are applicable to each motor-opergt.ed_velve,assemblyJ Hov) with an active safety related function h o are referenctd by _ Chapter l y V The licensse will test each Nov in the open and close directions under l static and maximum achievable conditions using diagnostic equipment that j measures torque and thrust tes applicable to the type of MOV), and motor l parameters. The licensee will test the Mov under various differential l pressura and flew conditions and perform a sufficient number of tests to d reliably M agolag the torque and thrust requiroments to its design gycLfAW conditions. We licensee will determine the torque and thrust requirements to close the valve for the position at which there is (.iagnostic indication ,
I of hard seat contact. me licensee willCentrapolatR the torque __and thrust ggl requirements (including diagnostic equipment inaccuracyT from the test to ,
design conditions for such parameters as differentisi pressure, fluid flow, (seismic / dynamic __ offecWfunder voltage :.nd temperature. For the point of conhol switch trip, the licensee will deterlaine any loss in torque produced by the actuator and thrust delivered to the stem for increasing differential pressure and flow conditions (referred to as load sensitive -
behavior). The licenses will compara the design torque and thrust requirements to the control switch trip torque and thrust subtracting margin for lead sensitiv2 behavior, control switch repeatability, and degradation. The licensee will measure the total thrust and torque delivsred by the NOV under static and dynamic conditions (including diagnostic equipment inaccuracy and control switch repeatability) to compare to the allowable structural capability limits for the individual parts of the MoV. The licensea will test for proper control room position indication of the MQV.
The parameters and acceptance criteria for demonstrating that tre above functional performance requirements have been met are as follows.
(a) As required by the safety functions the valve must fully opens the valve must fully close with diagnostic indication of hard seat contact.
(b) The control switch settings amat provide adequate margin to achieve design requirements including consideration of. diagnostic equipment inaccuracy, control switch repeatability, load sensitive behavior, and margin for degradation.
(c) The motor output capability at degraded voltage must equal or exceed the control Twitch setting ir:cluding consideration of diagnostic equipreent inaccuracy, control switch repeatability, load sensitive behavior and margin for degradation.
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(d) The maximum torque end thnsst .(as applicable for the type of Nov)-
achieved by the Mov including diagnostic equipment inaccuracy and control switch repeatability must not exceed the allowable structural eapability limits for the-individual parts of the Mov.
(a) The remote position indication testing must verify that proper disk position is indicated in the control-room.
(f) stroke-time measurements taken during valve opening and closing must meet minimum and meninnan stroke-time requireesents.
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- The COL applicant will
[frequency dea'stug!M:::: determine the optimal
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Mp-64ps e4pAj;4 . ( see Subs'setton 3.9.7.3(2) for COL !! cease informatlos requirements).
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