ML20059M752
| ML20059M752 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 08/24/1993 |
| From: | SARGENT & LUNDY, INC. |
| To: | |
| References | |
| OLA-2-I-MFP-T-3, NUDOCS 9311190284 | |
| Download: ML20059M752 (29) | |
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II PACIFIC CAS AND ELECTRIC COMPANT '
DIABLO CANYON POWER PLANT UNITS 1 & 2 -
Project Number 8664-03 I
EFFECT OF IDCALIZED HIGH TEMPERATURES UPON EQ COMPONENTS f
n Prepared'By Sargent & IAlndy Engineers February 27, 1990 NUCLEAR RECULATORY COMMISSION Docket No 'S $5-dL k om, a T- S w v m, a Bemqffx _azg,/y@) ptgeypic_go 8'"
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9311190284 930824 -~. -- -- - ' 40 .I_ _._ ADOCK 05000275 l' v_,....__._. , me PDR Q PDR .. , _ cmea.h;t]?]ljl$}Q _,,. y,g9g o~ ,. o e,, Reporter C- .<8 i
CARCENTQ LUNDY ' ! .swoimazoo -
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f l s s I ( Executive summary
- some EQ components experienced higher peak temperatures than considered in qualification documentation.
- Affected EQ components' include: .
- items mounted L..ectly on or in close proximity to high energy lines
- cable inside the-primary shield wall cable above the-steam lines in area GW and GE at elevation 115' Evaluation of higher than postulated temperatures concludes: ..
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- life is reduced, however all EQ components have sufficient qualified life g to operate until the 4th refueling outage (IR4, 2R4).
l Recommendations for additional action include: evaluate applicability to other. safety-related (Non-IQ) components
- augnent the existing temperature surveillance program provide cooling to affected areas
- revise applicable EQ binders ,
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t ( - ! s-i - 4 ' ' SARGENT & LUNDY ENGINEERS f Chicago i ' ! Table of Contents 4 Page Number
! Description P
1 ! 1.0 Introduction 2 l 2.0 Approach 2 3.0 Population of Potentially Affected EQ Components 3
- j. 3.1 Temperature Surveillance Program 3
3 3.2 Screening Process-5 1 4.0 Assessment of Temperature Measuring Technique 4.1 Temperature Measuring Stickers 5-I 6 4.2 Accuracy of the Results 6 4.3 Applicability of the Results 7 j 5.0 Measures vs. Postulated Temperatures 7 5.1 Postulated Temperatures 4 8 5.2 Measured Temperatures . 12
! 6.0 Affect Upon Service Life 12 3
7.0 Recoarsendations 12' j , 7.1 Short Tenn Recommendations la i 7.2 Long Term Recommendations 16 I 8.0 Appendix 8.1 Tables Appendix A , i ' I 8.2 References Appendix 8 I : 1
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e 9 Pacific Cas And Electric Company . Diablo Canyon power plant Effect of Localized High Temperatures Upon EQ Components N Prepared by Sargent & Lundy Engineers lR 1.0 Introduction The Environmental Qualification (EQ) of electrical equipment subject ' to the requirementa of 10CFR50.49 is based upon the environmental conditions defined in DCM M-76 Environmental Conditions for SQ of Electrical Equipment". This Design Criteria Memorandum (DCM) defines bulk ambient temperature postulated for each harsh area. As espected, the actual normal service temperatures are generally well below these design limits. However, components which are mounted directly
- on or in close proximity to high temperature sources-(e.g.
pressurizer, and high energy process lines) esperience local surface tem-peratures which are greater than the bulk ambient temperatures defined in DCM M 76. To determine the magnitude of these local surface temperatures, temperature measuring stickers were placed on EQ coepnents which were suspected of esperiencing higher than postulated temperatures. These stickers record the peak temperatures esperienced. Peak surface temperatures measured via the stickers were found to be greater than those defined in DCM M 76. This sendition was documented in Non Conformance Report (tICR) DCO 89-EN-N017. The consequence of these higher than postulated temperatures is that the qualified service lives may be less than the qualified service lives defined in the 30 Sinders. ( . 1
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4 4 ,, . ' t j - - i-J i i i ! ( To determine the scope and consequences of this condition, an investiga-j i tion was conducted. This report dociaments the approach and j findings of this investigation. It also identifies the population ) i of 30 components of potential-concern, evaluates the impact upon qualified l service life, and provides recommendations for additional action. , 4 i 1 2.0 Approach l Phase 1 A three phase' approach was'utilised for this investigation. i consisted of identifying the population of EQ components which could > 4 potentially experience higher than' postulated toeparatures. .This is i discussed in detail in Section 3. ' Phase 2 consisted of defining the' 1 1 4 temperatures being experienced. A temperature surveillance program was ' f_ established to do this. Since actual temperature data was not ; g -
- available for all ecaponents ultimately identified in Phase 1 extrapola- ;
l tion of as measured conditions to other components of potential concern ) This is discussed in detail in Section 5. Phase 3 consisted of i i was made. l i evaluating the impact of these higher than postulated temperatures upon the qualified service life. This is discussed in detail in Section 6. I i 3.0 Population of'Potentially Affected E0 Components i An initial list of potentially affected EQ components was established ? which included all EQ components:: ] )
- located in the primary' containment ,l
' - located in areas for which PG&E plant walkthroughs indicated that i there may exist localised' hot spots (i.e. areas GE and GW at.elev. ( t 135') i 2 i
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- which possessed the conditions that the temperature surveillance -
program .indirmead may cause high local surface temperatures. ( The initial list was then ~ reduced through a screening process to arrive l at a final candidate list.; The basis for this is discussed below.
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, 3.1 T e rature Surveillance Proaram i ! A temperature surveillance program was established by DCPP Maintenance to l
- monitor the' temperature of 30 components which were suspected of experiencing higher than postulated temperatures. This program placed temperature measuring stickers on approximately 147 components located inside containment and 12 components located outside containment to determine the peak surface temperatures experienced.' he peak. temperature recorded for most EQ components was well below the design ambient temperatures defined in DCM M-76. Bowever, several components were found to experience i
peak temperatures in excess of the design ambient temperatures. These f
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consisted of components which are mounted directly on or in close proxim- , ity to high energy lines (i.e. reactor coolant and turbine steam supply). J 3.2 Screenina Process , The tamparaturs surveillance program indicated that components subject to substantial conductive heat transfer via direct attachment to hot piping may possess surface n.asperatures greater than the postulated bulk ambient temperatures. Best conducted from steam. lines through valve yokes to ] operators, pilot solenoid valves. and position switches resulted in the j i temperature of the these items being higher than the ambient.: The envi-ronmental qualification files did not consider the effect this best flux - had on the temperature of EQ components. I
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' As a result of the above observation, ths. initial list of potential
! ( candidates included all EQ components associated with systems wh'ose i i Typi-temperature during normal power operation is greater than 200' F. cally, these items consist E motor operators, position switches, pilot-l solenoid valves and temperature elements. These systems are defined in i s l Table 1. l s j The temperature surveillance program also demonstrated that most EQ , i components located inside the containment experience temperatures less than those defined in DCM M-76. This permitted reducing the list of potential candidates by eliminating. items which: i
- The temperature surveillance program has shown that the actual peak surface temperatures are less than the design ambient temperatures.
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- Are located on or near sections of process pipes whose temperature l
S during power operation, as defined in DCM M-46 " Piping. l i
- Pressuras. Temperatures, and Operating Modes" is less than 2000 F.
i Typically, these items consist of motor operators for valves, position switches and pilot solenoid valves associated with air ! operated valves, and temperature elements. i
- - Are not associated with hot pipes and are located-in areas whose i
temperature can be concluded to be less than the design ambient .. l temperature. These are devices which were not individually l monitored in the temperature surveillance program but are located 4' 1 in the same general' vicinity as devices for which the temperature sur-i ! veillance program has shown that the. actual ambient temperatures are l {
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less than the design ambient temperatures. j l 4 4
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". The resulting list of potential candidates -is presented in Table 2. It ,
8 abould be noted that this list not only contains the few items known to - ( g experience higher than design temperatures, but also many items for which actual tamperature data was not available. It is anticipated that additional data from .the temperature surveillance program will pro-wide W justification to eliminate them, 4.0 Assessment of Temperature Measurina Technione As discussed previously, under the temperature surveillance program temperature measuring stickers were placed on selected EQ components to record W peak temperatures experienced. Use of such stickers raises questions as to the accuracy, applicability and correctness of the results.. Each of these is discussed below. [ 4.1 Temperature Measurina Stickers. i s The stickers used are manufactured by the Telatemp Corp. of Fullerton, California. Each sticker has six windows, each sensitive to a different. temperature. Each window contains black blotter paper coated with a white chemical. This chemical has an estremely sharp melting point. The window appears white until the chemical melts and is absorbed into the black blotter paper at which point the window appears black. This color change occurs very rapidly (i.e. less than one'second). The process is irnversible, once the window set-point temperature (i.e. white chemical melting point) is r, ched, the color change is permanent. Because each window has a diacrete set point temperature (for naample 2000 F, 110' F, 1200, 130' F, 140' F, 150' F ), the peak temperature I vi.., experienced then is greater athe temperature associated with the black 5
windows but less than the temperature associated with the white sindows. i l A sample sticker is shown below. l Y&& 2' 4.2 Accuraev of the Results The accuracy of the results were verified by testing a representative sample using calibrated test equipment traceable to the National Bureau of Standards. The testing checked the accuracy of the set point tempera-tures. The results, which are documented in Referen.e 6. reflect an accuracy of i 1.10 F. l The effect of humidity and radiation upon the accuracy of the stickers was discussed with the manufacturer. The manufacturer replied that humidity will have no effect; However, he has insufficient experience or test data to respond as to whether radiation will have any effect. In regards to humidity, he stated that because their construction seals the windows in high quality sylar they can perform properly even if cubmerged. 4.3 Applicability of the Results Use of the stickers as a means to determine the ambient temperature is conservative for the following reasons: a) The temperature used for evaluation purposes is always higher than
, the peak temperature actually experienced. Since the sticker i
does not indicate the exact peak temperature experienced, only the 3 1 6
i . . i l l . bounds (i.e. greater than value z,'less than value y) the upper - . '> ( bound is conmarwatively used. b) The stickers measure peak, not average temperature. c) The stickers do' mot distinguish whether the heat source is contin-2 1
- vous or transient. Depending upon exact function and service, some ceapo- l
- i l' uents may be esposed to higher temperatures for only a feu seconds, minutes j I
j or hours. Unless there was a sound basis to assume otherwise, tho' peak ; temperatures recorded by the stickers w re assumed to have saisted continously. i 1 5.0 Measured vs. Postulated Temperatures j The temperature surveillance program revealed that the surface temperatura l l of EQ components mounted on hot pipes is greater than the ambient because of. 'i . conductive heat transfer. EQ items not mounted on hot pipes but located in-the same area as hot pipes were considered as potential candidates. This j ( section examines the measured ambient temperatures in such areas!to determine
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g if they exceed the ambient temperatures considered in the EQ Binders. 5.1 Postulated Temperatures The EQ Binders are based upon the bulk ambient temperatures defined by l DCM M-76. For the areas of concern the design bulk ambient temperatures are ! l l Primary Containment general open areas 508 - 120' F inside shield wall 50' - 135' F CRDM shroud area 50' - 150' F { Outside Containment I t areas CE and W 390 - 1040 y l I 1 l e w*, ,e.- -t,--,-wn- w+e,.~ ,- - - - -*,.~%------ee.- . . - - . = = . . . . , - - - - -~~m- - - -.'
_ _ . - ____ . _ _ . _ - - = I 5.2 Measured Teameratures 5.2.1 Primary containment a) General Open . ,: The monthly average temperatures of the containment open' areas were recorded from January 1986 through April 1987. The results which are documented in reference 7 show the following tempera-ture. , Unit 1 Unit 2 lowest 94.36' F 91.46' F highest 100.548F 99.26* F . average 97.28' F 94.87' F Surface temperature measurements for containment instrument panels i located outside of the shield wall, which are documented in reference 8. reveal
# of Panels. Temperature Recorded
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15 t < 1000 F 2 105* FJ t < 110' F 29 1100 F f,t < 115' F 14 indeterminate The results judged to be indeterminate were for stickers in which the higher temperature windows (primarily 110' F) did turn black however the lower temperature windows did not. - From discussions with the manufacturer, it was concluded that these stickers may be faulty. 8
1 l b) .Inside Shield Mall. E Surface temperature measurements taken for conduit ET1768 (refet.ance 5) t .. which is located inside the shield wall adjacent to W pressuriser-(i.e. inside the pressuriser missile shield)- find the temperature to be ~ 340' F S t < 1608 F Considering that: 1 the pressuriser is the hottest component in the containment. and
- the missile shield wall impairs ventilation / cooling of this confined area and l
this conduit should not experience appreciable 1 R2 heat rise because it contains power cable for the Limitorque operator associated with valve 8000A which is only energized momentarily. It is reasonable to conclude that the confined area inside the missile I wall is a localized warm spot._ The'EQ devices located in this area consist of Class IE cable and components in direct contact with hot pipes ! (i.e. valve operators, position switches and' pilot solenoid valves). The Class II cable in this area is not subject to 12 R heat rise as it is associated with signal circuits. control circuits, and power circuits for motor operated valves. Therefore the maximas temperature th:y may experience is considerably less than the temperature for which they are rated and qualified, 908 C (194* F) Based on the fact that: the peak temperature measured for conduit ET1768 is not significantly, i above the postulated ambient (135' F per reference 3), and' l this temperature was measured in a confined area near the hottest
- component in the contairmient, and this area is not well ventilated-9
j . . . it la reasonable to.assues that the temperature of other areas inside the I ( shield wall will be less than the postul'ated ambient (135' F). This j
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assumption will be verified by additional toeperature . surveillance j i measurements _(refer to recommendation 7.1.b). Bowever. - for conservatism,
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the peak measured temperatures were used in calculating the revised / j aervice life abown in Table 2.
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c) CRDM Shroud Area. t. i 1 Surface temperature measurements taken near the unit I reactor i
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j head, which are documented in references 5 and 11. find the temperature l
, to be J
- 1200 F i t < 1400 F
)
Based upon the above data it is concluded that the ambient temperatures
- defined DCM M-76 for containment open areas and in the CRDM ahroud area I I
, are conservative. The high temperature concern for EQ components in these j
areas is limited to items in direct contact wi5h hot pipes (i.e. l } valves, valve operators, pilot solenoid valves, pos'ition switches, position monitors and temperature elements). 1 t j 5.2.2 Outside Containment - Areas GE and GW Temperature measurements taken in area GE and Gw at elevation 115' while 'at full power reveal that the temperature is not uniform. Rather a localized warm ares axists in the congested areas famediately above the turbine steam supply lines. Teeperature measurements made-in this area reveal: At ilnit 2 ceiling 1350 7 measured with a hand held temperature probe on 11-15-89 (Ref. 9 1400 F f t < 160# F indicated on temperature sticker (Ref. 9) 10
i . ,= - l O At Unit 2 esiling . l ( 260' 7 f, t < 180' F indicated on temperature sticker (Ref. 5) Surface temperature of Unit 2 conduit routed along or near ceiling measured l
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with an infrared temperature monitor on 11-15-89 (Ref. 9) Conduit # Topperature E6126 140' F l ED430 141' F E7396 134' F EK330 132' F K6491 129' F K6453 137' F K6485 132' F .. i surface temperature of Unit I conduit KT251 (which contains signal i cable and thereform is not subject to 1 2R heat rise) reveals that the warm area is highly localized, these measurements show that the warm. areas are adjacent and above the turbine steam supply lines (Ref 5). ~ Elev. Bat. above floor Temperature 117' 2' 2008 F $ t < 120' F 226' 11' 120' F $ t < 140' F 133' 18' 140' F i t < 160' F 338' 23' 160' F I't < 1808 F.. Steam line centerline is at elev 129' or 14' above floor. Based upon the above data it is concluded that the' ambient tempera-tures in areas GE and GW at elevation '115' (floor to ceiling) do exceed I the bulk ambient temperatures defined in DCM M-76. 11
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l l.* l l l j . .i I.+ , l 6.0 Affect Voon Service Life l 3( The principal effect of the higher than expected temperatures is i to reduce the qualified service life of the affected SQ components, which correspondingly increases the amount of maintenanes/ replacement required. Table 2 identifies the qualified service life based upon the , design ambient temperatures defined in DCM M-76 and the qualified service , life based upon the temperature determined via the temperature surveillance program. Since actual temperature data for a number of com-ponents included in Table 2 was not available from the temperature sur - , weillance program, the ambient temperatures used were based upon an extrapolation of measured temperatures for similar components. Whenever an extrapolated temperature was used this is noted in the comments column. Table 2 shows that all affected EQ components have a qualified life ' greater than ! I g 6 years. Therefore, no components require replacement prior to 1R4 and 2R4. l 1 7.0 Reconrnendations 1 7.1 Short Term Recommandations .I a) Add stickers to components identified in Table 2 which are currently not being monitored via the temperature-surveillance program. As discussed in Section 3, this table identifies items which may potentially esperience higher them expected ambient temperatures, but currently there is insufficient data to substantiate or disprove this. .j Obtaining actual temperature data via the' temperature surveillance program should provide the justification to eliminate many of these items from
\ Table 2.
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. t Action: I & C Maintenance (R. Washinnton) Schedules < k b) Add a minimum of 6 stickars' to small conduit located faside the primary shield wall. 3 stickers should be located outside of the'aissile barriers and 3.inside the missile barriers. Stickers should be placed only on conduit-not subject to 1 2R heat rise (i.e. conduit associated with signal or control circuits). Actions: Electrical Maintenance (D. Bauer)- Schedules -i c) Use stickers which record smaller increments (i.e. S* F) of temperatures instead of the 10' F and 20' increments currently -l used.- This will permit more accurate temperature determination. l reduce excess conservatism, and result in greater. service lives. Action: Eleet. Maintenance (D. Bauer). I & C Maintenance (R. Washinaton) ( g Schedule - d) Provide temporary cooling to the area.above the turbine steam supply lines at area GW elev. 115'. Action: NECS - Mech. RVAC (R. Clark /B. Sethi) Scheduist e) Revise the EQ Binders affected by Table 2 until additional temperature surveillance data is obtained. The data required. includes: peak temperature measurements for components listed in Table 2 for which such data was not.available for this investigation. time-temperature profiles for devions believed to esperience significant temperature variations or transients (refer to reeemmendation 7.2.b). Action: NECS Elee. Enn. (T. Fetterman). NECS I'& C (K. Eerman)- Scheduler i 13
i i e i . 7.2 L M Tara Recoemendations ; 1
- k a) This investigation only considered items which are included in the scope
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j of the EQ program. The EQ program excludes Class 1E devices located-
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} i in mild environments and also ancludes some Class 1E devices which i I are located in areas subject to harsh environment' but are not required I to function in the harsh environment. Items in the later category are ' denoted by note 16 in the EQ File column of list 050909 " Class IE Electrical Equipment Qualification List". Since some of these items are in direct contact with hot pipes, for esemple, the motor sport.:.r associated with FCV-33, conductive heat transfer may result in their i normal service temperature being significantly higher than that defined in the design specification. Even though these items are excluded from j the scope of the DCPP EQ program, PGEE should consider the effet:t, if any, that these higher than postulated temperatures may have upon the ( items maintenance / parts replacements requirements. 3 Action NFCS Elee. Enir. (T. Fetterman). NECS I & C (K. Berman) Schedules b) Install temperature recorders which will provide a temperature vs. time profile for the devices / areas defined below. These are devicces/ areas which are believed te experience significant temperature variations. Obtaining their temperature history for a minims. of one operating cycle will permit more accurate evaluation of high local surface temperatures upon qualified service life. Currently, the temperature surveillance program provides only the peak temperature's arperienced. Use of these peak temperatures for devices / area which experience significant temperature variations or transients is overly conservative. The devices / areas recoussaded to be monitored ares (
- 1. 1(2)-07-I-5-POS-16 position switch associated with PCV 455C 14
4 ) .2. 1(2)-07-7-vtat-3CS-1-80003 meter operator (bottom of limit switch - g l compartment mover). (
- 1(2)-07-P-V-3CS-1-80783 or C solenoid housing of' valve j 3.
- 4. 1(2)-04-I-5-705-182 or 183 position switch associated with PCV-22 l 5. Small conduits in area EN elev. 115' which are associated with-signal circuits. A minimum of three locations should be monitored as follows:
- at ceiling dire"1.y above st.eam lines in ares judged to have the highest temperature. ,
- at ceiling - not directly above a steam line.
- lower elevation adjacent to a steam line.
It is recommended that both units 1 and 2 be monitored as temperature ~ surveillance data indicates temperature variations of approximatelyi 200 F between Units. ( Action NECS Elec. Ener. (T. Fetterman) Schedule: c) Install additional EVAC equipment to improve the air circulation / cooling of the congested area above the steam lines in area CE and GW at elev. 115'. Action: NECS Mech NVAC (R. Clark /B.' Seth) Schedules d) Revise the 30 31nders to reflect the actual service temperatures experienced. Action: NECS Elec. Entr. (T. Fetterman) NECS I&C (K. 'Berum) Schedules e) Implement a cable monitoring program whereby cable can by readily identifind by location and service. Action: NECS Elee. Enn. (T. Fetterman) Schedule 15
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8.0 Anpandir ! i S.1 Sables .- ,
- - . . Appendix A
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8.2 References __ Appendix B i
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. Table 1 W r Systems with EQ ca=pa===ts with process pipe temperatures' greater than P j
1 ( .
~.e+- --" J ;
i 200* F. , ' . L. s j , W.4.7 g
~
System Code Description ' h ~j 1 I
' j d
- 3 Feedwater -
1
- +1 1 4 Turbine Steam Suppy $ i
' l ! 6 . Auxiliary steam -j .l t * ' 7 Rapetor Coolant
- 8 Chemical Volume'and Control i
J i 9 Safety Injection. Note 1 } ! 10' Residual Beat Removal' ' Note 2 ! y ! 19 Liquid Radvaste l . s ( , Notes: . .,...
.] -3
- 1. During normal power operation.' the safety injection system' is notlin < ..
- I service and process pipe temperatures ~are l'ess than'200o F. However- %
during refueling a portion of the safety injection piping is used in conjunction with RER to provide core cooling. DCN M 46 define. .he 1 piping temperatures as 1148-2500 F for this mode. This'is judged'to be- ! 1 insignificant as these temperatures will exist for a short duration on1y.' l Bence, safety injection is excluded. j l
- 2. During normal power operation.' the residual heat removal system is- l 1
mot is service and the process pipe temperatures are less than 2008 . . Bowever D01 M-46 defines the piping temperatures during refueling andi
~
F. abnormal' uode 'I. hoth of which are considered to be normal. conditions as , ( s- 1408-350' F. . This is judged to be insignificant as these temp iratures will exist for a short duration only. Eence. Rasidual Beat Removal is excluded. - w._.-----..-,*, - __m - . . . . . _ _ . . . , . _ , , . . ., -
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. ~ h -E Attachment 1 to Table 2 e e 4 ( -
5 Resis for Temperatures Used in Ivaluation' [ , , 3 j Basis 1 Operators associated with FCV 440,441- ' - 4.m
- u. -;I Temperature surveillance measurements (Ref 4.5.11)'abow j ygLv1 EDAL1 EDiL2. Date obtained 3 440 140'F,1 t < 1608F 120*F f t <-140*Fi RF2 .,
1 440 220'F 3 t < 14087 RF3 l . 1 j 441 140*F < t < 160*F- RF2 4 ~
- 441 140'F f t < 1608F ' RF3 i
i LUsepeak'valuemeasured[(160*F)- i j
! Basis 2 Operators associated with FCV 95- '
i . Temperature surveillance measurements.(Ref.5,11).. . which'are only,available i ( ! s for Unit I show 4 i j 140'F S t < 160'Y obtained during RF2' 140*F f t < 160'F obtained during RF3. , l Use peak value' measured (1600 y)- 4 Basis 3 Operators associated with FCV'8000 A',B,C-
- Temperature surveillance measurements (Ref 4.5.11) show ,
f ISL EBLt.l EDiL2, Data Obtained Durina 8000A .140.f t.< 160 180 $ t'< 200 RF2 - i 8000A 160 $.t < 180, RF3-s i 80008 160 3 t < 180 100 $ t < 200 .
' RF2 t
1 1 80005 140 $ t C .160 RF3
'3000C - 140 f t < 160 180 $ t < 200'- ' RF2-1 8000C . 240 f t < 160 RF3 i
9iw-em tw en--we5- 9 er g at w-g e-a w* v4y P us. w4$=ig--'+ss-- 'asf*- 1a +g - Seq-WmWh' i=9-geagt 'a '
-.-- yrye de . nee 'g gwa$ ee +=-in w 9 v*Lh.--eg..g .=yT g +^.--D.M<de-ta=86' M %+w- se aw-e w'4rw e -- 4 Eur1' a'^=%*C'-v'-h*Rli 1mh
Secause the downstream PORVs (PCV 455C, 456, 474) are closed'during normal power-
~
operation, but momentarily open during pressure transients, there should be significant temperature trariations between conditions of flow and no flow through . . j the process pipe. Per discussion with operations momentary opening of tbs FORVs . occurs frequently during shutdown. It is therefore reasonable to assumo'thet the lower temperatures measured correspond to normal power conditions (i.e. PORVs closed and no flou) while the higher teaperatures correspond to transie... when the 70RVs are open. Ilse lower temperature (160' F). Basis 4 Solenoids associate with valves 8075A 'B, C D. Bec-use valves are normally closed and because of their physical configuration, one would expect ; the temperature surveillance measurements to show higher temperatures for valves ( B & C than for A & D, but this is not the case. 8078A 240 $ t < 160 ---- (Ref. 4, 5,.11) 8078B " " l 140 $ t < 160 ---- 8078C " " 160 $ t < 180 ---- 8078D " " 160 $ t < 180 ---- l SoloA. k [ ) N " I 4M86 M 1 j W[ l $ go13C. V I The peak measured value (1808) 1 o'
. .-~.-.... +.- ..
j , g , c 4 ( . Position switches associated with FCV 22, 23. 3 j ( hsis '5 Temperature surveillance esasursments (Ref. 9, 10)'show: I FCV-22 2280F(Ref.9) t - ) .1300F 1 t 4 1400F (Ref. 10)' 1200F1t.<130'F(Ref.10) FCV-23 Most probe.ble temperature is 130'F 1 few degrees. Use 1300F. i Basis _6 Position switches and pilot solenoid valves associated with q FCV 43, 44 : Temperaturesurveillancemeasurements(Ref.9,'10)show' l FCV-43pilotsolenoidvalve100.70F:(kef.9)l , f FCV-44positionswitch1200F$t<1300F.(Ref.-10)' - l Since reference 10 represents a peak- temperature and the' peak value. ; 2 g j is higher than that provided in reference 09, it is reasonable to' R l assume that the peak temperature represents a short duration-1 . l fluctuation. use 1250F. i CON 81AVA,TNf LY
- 4 l.
Basis 7 Position switches and solenoid valves associated with the PCV 455C.. 456, 474. Since no temperature surveillance data is available and because they are located downstream of FCV 80004, B. C, use tesperatures dstermined in Basis 3. l Basis 8 Position switch associated with FCV 255. Since no temperature surveillance data is available and this valve is an inboard I ecstainment isolation valve for Reactor Coolant Drain Tank went line (max line temp per DCN N-46 is 2660F). Conservatively.use-I containment open area ambient (1200F) + (100F) = 130'F.
\
I I 4
1 4 s j
~
3aalLR Poetion estches associated uth warhus estihe steem agiply system Wwas for which temperanno mswomance den is aos ==enhia
.l
\ t is reasonable to sesume tut sie temperstwo mswomance data obtained for the postion i entches es th antihe w steem supply symem wves revu rev as, Fev da and R l Fev 44 is represennsw of the tempembres aupacted for tese poeWon swtches. The anwomanos dem is pnwided h seeis 5 pao 7) and semis s (1as F): ser onneenodem, use 130' F, Basis 10 Poetion swtches and solenoid webs associded wth PCV 830 & 540 (main feedneter supply to steam generators 14 and 14). Temperature arveEence data (Ref. 9) for FCV .
530 shows: Position awkch 118* F eclenoid vehe A Body 118' F , Col 12 F aolenoid valve B Sody' 128' F-g Col 130* F j Use 130' F ] l
.i EaslL11 Prosaure transmitters FT405, sos,534,536, 544,546 mounted on local hatrument panels
. outende cortninment h areas GW elev.115' and D elev. 85'.
Shoe these panels are not located h the conDested L .s above the naam anos in area GW elev.115', t is believed that their temperature is less een to pashastM amblert (140 7). Since no temperatum des is avalable, consenedwely use 120* F.
~
Basis 12 Cable outside certainment in aren GE sid GW st elev.115' Temperature survemanos data, Ref. 5,9,11 show max measuremorts of: 1 180 F S t < 180 F l Use 100 F.
- . . _ _ .- . _ , . . . . . _ . , _ _ . . . . . . _ . . -_,_ _. _..-_.-_ _.._ _._-~._- -.- ..--. .
, . f
. - , _ _ _ _ . .- '/ '
1ssis 13 Cable in containment open area per discussion in'section 5.2.1.2 of. .
, 1 report. Use postulated ambient 1200 F.
( N ~ Basis 14 Cable inside primary shield wall per discussion in section 5.2.1.b { of report. . . . 2:L' .:- Use 180' F. . . Basis 15 Cable in CINI shroud area per discussion in section 5.2.1.b of report I
'Use postulated ambient 150' F.
' Basis 16 Temperature elements TB 410A, 33 411A, B,3 413A, B '420A, Bs'421A, B:
423A 3; 430A, B; 431A', 33 433A, 33 440A,' B; 441A, 23 4434. B's Since no temperature surveillance data is' available, use inside primary shield wall temperature. Selected per Basis'14, 180' F.- . 9
* 'W I
l i
l,- 131665- )-
~ ~
f l ( i i l
- t - . . . .
TDFERATURE DATA NETRIEVED DURING IR2
- TDFERATURE -
SENERAL RANGE (DEGF) l ITEM . DESCRIPTION- LnCATION ELEVATION 18W
- N18Il +- -!
l FW 115 NONE WONE FCV-37 NONE .NONE
~
FCV-438 FW 115 FW 115 NONE NONE FCV-439 120 G 91 100 FCV-658 FCV-659 G 91 '00 120 6 91 100 '120 FCV-749 120 G 91 100 ,. FCV-750 NONE G 91 NONE 8112 120
- 6. 91 100 8701 140 G 91 120 p 8702 120-6 91 100-t 8703 '200 G 140 180 8000A 200 6 140 -180 80008 l200 8000C G 140 180-
'G 140 .180 8078A G- 140 160 80788 180 l 8078C G 160- ;
G .160. 180 80780 l GW. 115- 160 .180
- FCV-38 GW 115 120 140 FCV-440 GW 115 NONE' RONE FCV-441 GW 115 NC"E RONE FCV-95 GW 115 120 160 NEAR FCV-38 NOTE: Locations with tesperatures listed as NONE had temperature stickers installed during the sistage.
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