ML20100R373
| ML20100R373 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 02/20/1992 |
| From: | ALABAMA POWER CO. |
| To: | |
| References | |
| CIVP-A-052, CIVP-A-52, IEC-78-08, IEC-78-8, IEIN-84-47, NUDOCS 9204080105 | |
| Download: ML20100R373 (38) | |
Text
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APCo Exhibit 52
& ysja W g yg RESemSE Io Y#Y"' 006 38'T2 E.O. ACTIQ 4 ITEMS 018 AND 067, TERMit4AL DLOCKS/ ** *!*
LOOP ACCUPACY AND IEC 78-08/IDI 84-47
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72 MR 13 P4 20 -
Westinghouse as documented in WCAP-11658 performed an evaluation of the ,
impact of cable and terminal block leakage currents during Containment ,n MSLB/toCA design basis enrironments on RPS/ESTAS and ERP setpoints fq uw,; @ 3, j y yuygl gyy Farley tiuclear Plant (TNP) Units 1 and 2. N< Alp To Assist Westinghouse in performing this evaluation, Bechtel performed a cable leakage current calculation for each of the required instrument loops (Ref. Dechtel Calculation E-87, Rev. 2). The icwest values of insulation i resistance per unit length of cable measured during qualification testing i as documented in Appendix I of Calculation E-87 were used to calculate the loop leakage currents. 'Ihe resulting percent of span errors due to the calculated leakage currents for each loop were provided to APCo by Bechtel letter AP-13600 dated October 1, 1987, and this data was provided to Westinghouse by APCo for preparation of the WCAP-11658 evaluation. Dechtel provided APCo and Westinghouse by telecopy on October 29, 1987 and November 2, 1987 with a table of Unit #1 and Unit #2 ERP, RPS/ESTAS instruments which indicated the manufactuter of the installed instrvments and the type and location of in containment terminations used for each loop (see Attachment Gl).
To complete the data required by Westinghouse for this evaluation, Bechtel also provided a value of IE7 ohms to be used for the insulation resistance of each loop termination inside the containment (Ref W-2244, 11/5/87).
O SELECTIG4 or lE7 ohms:
( j N
o Conax Corporation performed an environmental qualification (E.Q.) test for North Anna Power Stations 1 and 2 as documented in " Test Report on Electrical Terminations Subjected to Design Basis Accident Environment,"
Conax 'teport tio. IPS-107, approval dated 10/5/73. This test was performed to determine qualification of prototype electrical penetration assembly junction boxes, cable entrance configurations, termination and splicing materials and techniques, and conductors for in containment service. The test included various test specimens consisting of 810AWG thru #16 AWG conductor (wire) samples terminated on Connectron, Inc, Cat. No NSS3, terminal blocks, and inline splices for a range of conductor sites. The terminal blocks were contained in two enclosure boxes as described in Sect. 4.4 of the report, and shown in photographs on Pg 13 of 29 in Appendix F, IPS-107. A selection of test items (Sect.
5.3.1) were subjected to an integrated gamma dose of 2.5 E7 rads prior to assembly into the enclosures, and one enclosure was subjected to a 22 year simulated life (aging) after installation of all terminatienc and conductors (Sect. 6.5).
b d DCC EO-001/30 Page 1 of 4 9204080105 920220 PDR ADOCK 05000348 G PDR _ ___ . __
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The test operations (Sect. 6.0) describes the phases of the tesp0 6 3 87 3 sequence during which insulation resistance (IR) measurements were made, g Readings of IR were taken during the Phase I and II IDCA environment
\ testing. Sect. 6.6 describes the LOCA environment test operation. Peak chamber pressure during Phase I testing reached 57.5 PSIG (290'F) at 120 seconds, and Phase I peak chamber temperature reached 300'F (56 PSIG) at 10 minutes from introduction of steam (Time 0). At 60 seconds from Time 0, chamber chemical sprays were initiated. Phase I IOCA conditions continued for 30 minutes. Phase II IDCA testing began at 30 minutes, 45 PSIG (294*F), and at 30 minutes, 35 seconds, the pressure was reduced to 0 and temperature was ramped down to 144'r and was maintained between 140 and 150'r for 240 hours0.00278 days <br />0.0667 hours <br />3.968254e-4 weeks <br />9.132e-5 months <br />. During this time, chemical sprays were continually introduced into the chamber. IR measurements were taken on each test item during the Phase I and II IDCA tests (Sect. 6.6.12), IR Test Nos. 6 thru 16 of Appendix B (IPS-107).
Appendix E of IPS-107 provides a compilation of the IR Test Data. Graph No. 1 of Appendix E provides a plot of the minimum IR data points for the #16 AWG test conductor and terminal blocks which were recorded during the DBA and Post DBA testing for aged and unaged specimens. From this graph, it can be seen that the minimum IR point recorded for a $16 AWG creductor and block was 3E7 ohms for aged specimens, and 1.5E8 ohms for the unaged specimens.
o Similarity of IPS-107 IOCA test conditions to FWP DBE - the peak inside containment MSLB calculated surface temperature for a terminal box enclosure is 300'F, and the peak calculated containment LOCA/MSLB pressure is 48 PSIG. As discussed above, these peak conditions were satisfied or were exceeded in the test (IPS-107) conditions. The fN' radiation and thermal aging applied did not match the 40 year normal plus DBE design basis for FNP. However, as stated in NRC IEN 84-47 and NUREG/CP-0048 (Vol. 5), Sandia tests have shown that accelerated aging (thermal, radiation) processes and seismic aging do not significantly affect the ' rminal block IR performance, o Physical Similarity of the IPS-107 Tested Terminal Blocks to-FNP Installed Terminal Blocks - For the subject instrument loops (Attachment
- 1), three types of qualified terminal blocks have been used, States, G.E. CR151 Type B (CR151B), and Foxboro.
-States 600V terminal blocks mounted in metal enclosures were qualified for in containment at FNP by WYLE Report 44354-1. Attachment #2, AP-9097 dated 4/5/84, and E.Q. Action Item 088 Response dated 11/9/87, discuss the qualification of the installed configuration of States terminal blocks used in E.Q. applications at FNP.
CR151B 600V terminal blocks were provided in the G.E. Series 100 LV Conthinment penetration junction boxes at FWP as covered in G.E.
Qualification Report (Farley Document Control #U-406155).
WYLE Report.45592-4 provides environmental qualification documentation supporting the qualification of the Foxboro terminal blocks and junction boxes installed in E.Q. instrument loops at FNP.
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__u _ _ _ _ _ _ _ _ _ _ _ _ _ . _ _ _
0063874 Attachment #3 contains physical and dimensional information for the Connectron NSS3, CR151B, States, and Foxboro terminal blocks. With p
s regard to leakage currents in instrument and control applications, NUREG/CP-0048, vol. 5, indicates that the surface leakage currents
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induced by surface moisture films are the primary mechanism by which terminal blocks contribute to instrumentation and control circuit IR degradation. Therefore, the significant characteristics among the blocks to be examined relative to surface leakage currents are the center-to-center spacing between poles, and the presence of an insulating barrier between poles (applicable only to States, CR151B, and NSS3). '1he relative sizes of the blocks are also noted below.
Barrier Width of Center-To-Center Between Height of Block Block With Spacing at Poles Poles With Barrier Barrier Connectron NSS3 0.320 in. Yes 1.328 in. 1.25 in.
CR151B 0.5625 in. Yes 1.1563 in. 1.625 in.
States in, zWM 0.625 in. Yes 1.4375 in. 3 in.
Foxboro N0148PQ (Round) 0.9375 in. N/A Approx. 1 in. >2 in. Diameter To Test Pole 1.875 in.
Between Poles As shown above, all of the installed instrument loop terminal blocks have superior significant characteristics to the NSS3. Therefore, they should when installed in an equivalent enclosure exhibit equivalent or superior performance in regard to IR and resulting leakage currents during design basis event environments, o Physical Similarity of the IPS-107 Terminal Block Enclosures and Tested Configuration to FNP Installations - As shown in Figures 13,14 and Sect. 4.4 of IPS-107, the tested enclosures were sheetmetal with gasketed screw covers and were provided with a 1/2 inch drain pipe. The NSS3 blocks were mounted horizontally in the enclosures, and numerous cable cutouts were made in both sides of the enclosures adjacent to the terminal blocks. No conduit was used for cable entrances. Cable fittings were used to bring the test specimen cables into the test specimen enclosures apparently to simulate cable entrances from field cable tray rather than conduit. Due to the type of fittings and cable utilized in the test configuration, numerous leak paths for the test chamber environment existed between the outside and inside of the test enclosures exposing the terminal blocks and conductors to LOCA test chamber conditions.
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0063875 The configuration of installed junction box enclosures containing States terminal blocks is described as stated above in E.Q. Action Item 088, f'\ and Attachment #2. It should be noted that qualified States blocks were
- also used in limited applications in the Westinghouse Electrical k) Contairraent Penetration Assemblies B009 f. B011 and were installed in the Penetration Termination Enclosure. (Ref. U-216925A) The WP E.Q.
enclosure configurations for States blocks do not subject the blocks to possible submergence, and provide equal or superior protection to the configuration tested in IPS-107.
We G.E. Series 100 low voltage containment electrical penetration enclosures which house the qualified CR151B blocks have removable gasketed covers in the front and sides to allow access to the terminations. Conduit and cable access is designed to be in the top and bottom of the enclosures. Se terminal blocks are mounted vertically, and the bottom of the enclosures have openings for drainago of condensate. (See Attachment #3) The majority of all conduit and cable entrances are thru the bottom of the enclosures and there are no conduits entering the sides of the enclosures. The FNP E.Q. enclosure configurations for the CR151B electrical penetration blocks do not subject the blocks to possible submergence, and provide equal or superior protection to the configuration tested in IPS-107.
The Foxboro instrument terminal blocks are housed in Foxboro cylindrical cast metal enclosures with a gasketed round screw on (threaded) cast cover. (Ref. U-263438) One threaded conduit opening is provided in the center at the back of the enclosure for entry of the conduit from the transmitter (instrument). A field cable threaded conduit opening is-provided on the circumference of the cast enclosure and should be p oriented with the opening down for condensate drainage. The FNP E.Q.
Q enclosure configuration for the Foxboro terminal blocks do not subject the blocks to possible submergence, and provide equal or superior protection to the configuration tested in IPS-107.
CCt1CLUSIOth As the FNP terminal blocks used in E.Q. instrumentation and control circuits located inside containment have superior significant characteristics to the Connectron NSS3 block tested in IPS-107, and as the TNP E.Q. enclosure configurations do not subject the FNP terminal-blocks to submergence and provide equal or superior protection to that orovided to the NSS3 block in the tested conf 3guration, the use of minimum IR #16 AWG NSS3 values from the IPS-107 test report for calculation of DBE leakage currents on instrumentation terminations inside containment is acceptable.
The IR value of IE7 ohms provided to Westinghouse for performance of the evaluation of the impact of terminal block leakage currents discussed in WCAP-ll658 is conservatively below the minimum values recorded in IPS-107, j for the #16 AWG, NSS3 specimens.
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.n Bechtel Power: Corporation Engineers - Constructors 15740 Shady Grove Road '"
Gaithersburg, Maryland 20877 1454 301 - 25B 3000 $
t.P Q 5 19 S4 $ 4 In reply refer to AP-9097 g o
Mr. D. D. Kingsley, Jr.
Alabama Power Company Post Office Box 2641 Birmingham, Alabama 35291
Dear Mr. Kingsley:
Joseph M. Farley Nuclear Plant Units 1 and 2 Bechtel Job 7597-011 Environmental Qualification of States Type NT Terminal Blocks Inside Containment (R.G. 1.97)-
(PCR B-84-1-2595) (LS-83-066)
Bechtel Files A-78, A-91. E-91 and E-95 AP-9097 O This letter has been prepared in reference to Alabama Power Company's PCR 84-1-2595 and various telephone conversations, with R. L. George, B. D. McKinney, Jr., and M. A. Lalor.
Alabama Power Company environmentally and seismically qualified States teminal blocks in a NEMA 4. enclosure (junction box). This qualification was documented in WYLE Report 44354-1 dated March 8,1979. The model of terminal blocks qualified as documented in the referenced WYLE report is TYPE ZWM.
Duririg-the R.G.-1.97 compliance review, it was required to determine the-environmental qualification of additional teminal blocks / junction boxes located in areas of the auxiliacy building which would be exposed to post accident radiation. To determiae the qualification of these terminal blocks / junction boxes, it was necessary to perform a walkdown to establish the make and model of the installed terminal blocks. States indicated that the color of the terminal block barrier strips on the type IWM terminal block is tan (buff), and that the barrier strip colors for type NT blocks, also manufactured by States, vary from black to light grey in varying shades of grey. In perfoming the walkdowns,. States terminal _b)ocks.were found to be installed in all junction boxes, but none of the terminal blocks were observed to have , tan barrier strips.
This led to a reevaluation of how the test specimens (junction boxes with-installed States Teminal blocks) were prepared (fabricated) and documented for_ qualification testing at WYLE. From this evaluation, it was detemined that the junction boxes with installed States terminal blocks were fabric-s ated at the Farley site, and sent to WYLE for qualification testing. The States terminal blocks used in the test specimens were documented as TYPE ZWM, Catalog No. M-25012 in the WYLE Qualification Plan #545/1025/ES dated October 10, 1978, and this identification was retained in the WYLE l
A1TMg M OtT 42, I '
g,q . N.Tood TTEM5 OW h 007 p Mr. O. D. Kingsley, Jr. Bechtel Power Corporation
(') Page 2 AP-9097 0063881 Qualification Report 44354-1. A review of the States Company Bulletin 4-TB, Attachment 1, which describes the procedure for specifying a States teminal block indicated that Catalog No, M-25012 would be the catalog number for a TYPE NT, not a TYPE ZWM teminal block. The correct catalog number for a similar TYPE ZWM teminal block configura-tion would be ZWM-25012. As the States teminal block barrier strips observed during the walkdown were not tan, and due to the WYLE documenta-tion discrepancy on the catalog number versus teminal block type, personnel involved with preparing the WYLE test specimens and test procedures were contacted to determine the basis for preparing the test specimens. From these discussions, it was verified that the test specimens were prepared to simulate the existing installed junction boxes with installed teminal blocks, and that the terminal blocks used in the test specimens were typical of those installed in Farley Units 1 and 2. It was also in-dicated that the color of the barrier strips on the States blocks used for the test specimens was black. (Reference Attachment 2). In reviewing the mark numbers contained in the SCS Joseph M. Farley Nuclear Plant Master Bill Index which was used by Bechtel and SCS in preparing Bill of Materials and for specifying the type of electrical components and hardware to be in- 1 stalled in Farley Units 1 and 2, all mark numbers associated with States \
p teminal blocks reference a States catalog number with an M-prefix. (As discussed previously, the M-prefix specifies a TYPE NT block). From this Q evaluation, it has been concluded that the States teminal blocks qualified by WYLE Report #44354-1 were not States TYPE ZWM but States TYPE NT terminal blocks.
During the course of this evaluation, it was detemined that States manufact-ured the TYPE NT blocks with two types of barrier strip materials. (Refer-ence States letter dated March 14, 1984 Attachment 3 and States letter dated April 3, 1984, Attachment 4). From approximately 1926 until 1973,theTYPE NT block was manuf actured with a barrier strip constructed of C-501 Phenolite.
After 1973, the TYPE NT block has been manufactured with a molded barrier strip made from polypropylene.. Allied _Chemica]_ Grade FP-1080. With the exception of the barrier strip material change, all other block components have beer. manufactured basically the same within the standards of States Quality Control requirements since 1926, and the material properties and physical dimensions have been maintained. ,
The TYPE NT blocks qualified in the referenced WYLE report and test plan were identified in these doucments as having a barrier strip material of -
Allied Chemical Grade FP-1080 polypropylene. As visually discernable differ-ences exist between the molded polypropylene barrier strip used on the newer TYPE NT blocks and the stamped C-501 Phenolite barrier strip used on the older TYPE NT blocks, a black and white photograph was obtained from WYLE of the test specimen which was taken prior to environmental qualification testing. A visual examination of this photograph confims that the barrier strip of the tested TYPE NT teminal blocks was a molded barrier. Therefore,
!q/ it has been concluded that the States TYPE NT teminal block qualified by
WYLE Report 44354-1 was the newer TYPE NT block with a molded polypropylene barrier strip.
I
- i. Mr. O. O. xingsley, ar. Bechtel Power Corporation Page 3 AP-9097 ,
0063882 1
As the potential existed for the installation-of both the old and new i TYPE NT blocks in Farley Plant, and as only the newer TYPE NT block i
was detemined to be qualified by the referenced WYLE report, a j containment walkdown was conducted on Unit 1 between March 24 and March
- 28, 1984, to detemine if the older TYPE NT blocks were installed.
Attachment 5 contains a listing of the junction boxes / terminal 5>1ocks which were walked down in the Unit 1_ containment, and indicates the junction boxes which were found to(contain the older TYPE NT blorMD
{
Since the walkdown resulted in the detemination that some installed junction boxes contained States TYPE NT blocks with the older C-501 Pheno- .
lite barrier strips, an evaluation was. conducted to establish the environ-mental qualification significance of the older barrier str dp material, j General Electric (G.E.) had perfomed LOCA testing of States TYPE NT blocks 2 as documented in the letter dated November 27, 1973 with enclosed Test
. Report entitled "Teminal Block LOCA Test for Electrical Penetration -
Assemblies" dated November 6,1973. (This letter and enclosed report are l enclosed with this letter es Attachment 6). The G.E. test was conducted
- for a period of approximately 9 days with a maximum temperature of 3400F and a peak pressure of 103 PSIG. For Farley Units 1 and 2 it has been j established (Reference Farley Mechanical Calculation #18.11) that for a MSLB inside containment, the peak surface temperature of the junction boxes containing the teminal blocks is 3000F. It hasilso been established for Farley Unit 1 and 2 that the peak accident _pRssure inside containmt01,
{ would_b_e 48.4 PSIG resultjn d rom _ G OCA As the March 14, 1984, States letter, Attachment 3, indicates that the older TYPE NT blocks with C-501 Phenolite barrier strips were manufactured until 1973, it is assumed that the TYPE NT blocks which were LOCA tested in 1973 and documented by the
~
referenced G.E. report, Attachment 6, were the older TYPE NT teminal-y blocks. Based on this assumption, and the G.E. report conclusion that no
' significant deterioration of the blocks was observed in the G.E. LOCA test which exceeded the Farley accident temperature and pressure profiles.-it can be concluded that use of the older C-501 Phenolite barrier strips on the TYPE NT teminal blocks will not significantly affect the LOCA/MSLB
. pressure-temperature environmental qualification of the TYPE NT blocks.-
l To further substantiate this conclusion. data concerning the heat resistance
! properties of C-501 Phenolite material was obtained from the material l manufacturer National Vulcanite Fiber. (ReferenceAttaghment7). C-501-
- Phenolitehasacontinousheatresjstanceratingof250Fandashort
' time heat resistence rating of 300 F. Based on the established MSLB accident temperature profile, Attachment 8,which was used for detemigation-of the junction box / terminal block peak surface temperature of 300 F inside t
containment, the juncgion boxes /teminal blocks would be exposed to a temperature above 250 F for a period of less than 40 minutes.
. The referenced G.E. test did not-subject the terminal blocks to radiation
- testing; therefore, to determine the affects of' radiation on the older
! s C-501 Phenolite barrier strips, a materials search in the EPRI document entitled " Radiation Effects on Organic Materials in Nuclear Plants",
EPRI NP-2129, dated November 1981 was conducted. The C-501 Phenolite used to fabricate the barrier strip is classified as a U.enolic base laminate.
Ju
Mr. O. o. Kingsley, Jr. Bechtel Power Corporation Page 4 (s AP-9097 0063883 e
Page 3-3 of EPRI NP-2129 states that phenolic laminates exhibit very good stability in radiation fields and that electrical properties are generally stable to high doses. Table 4-1 on Page 4-6 of the referenced EPRI report indicates that certain phenolic laminates such as asbestos phenolic 4minates have been identified with a lowest reported threshold of 109 rad:. In Farley Units 1 and 2 containments, a total operating and accident integrated radiation dose of 5x107 rads has been detemined for radiation qualification requirements. Based on the known radiation properties of phenolic laminates discussed in the referenced EPRI report, in our engineering judgement, the C-501 Phenolite barrier strips will have no significant radiation degradation when exposed to a total integrated dose of 5x10 7 rads.
Based on the temperature - pressure, and radiation evaluations performed for the C-501 Phenolite barrier strips outlined above,and due to the similarity of the older TYPE NT teminal blocks to the newer TYPE NT teminal blocks, the environmental qualification of the newer TYPE NT teminal blocks documented in WYLE Report 44354-1 can be extended to include the older TYPE NT teminal blocks with C-501 Phenolite barrier strips. It should also be noted that based on States letter dated March 14. 1983 Attachment 3 the TYPE NT and the TYPE ZWM blocks are manufactured to the same Quality Assurance program and the new TYPE NT and the TYPE ZWM blocks g are manufactured from the same materials with the exception of the clamp screws which are a rust proof Everdur bronze clamp screw on the TYPE ZWM.
Therefore, the environmental qualification of the States TYPE NT teminal blocks documented in WYLE Report 44354-1 can also be extended to environ-mentally qualify the States TYPE ZWM teminal blocks for use in Farley -
Units 1 and 2. As States considers the TYPE ZWM terminal block as a Class IE terminal block for use outside containment by their qualification requirements, and due to the statement in Item 2.a of Attachment 3 it is recommended that for future design changes to Farley Units 1 and 2 States TYPE ZWM.temineLblogks_be_specified.
During the March 1984 walkdown of the Unit 1 containment junction boxes /
teminal blocks to establish the installed States block types, it was observed that various junction box types were used to enclose the States TYPE NT teminal blocks. The junction boxes used in the WYLE environmental and seismic qualification testing documented by WYLE Report 44354-1 were NEMA TYPE 4, continuous hinge, clamp cover boxes, Hoffman Engineering Cat No. A-1412 CHNF. The March 1984 walkdown data on the installed boxes indicate that approximately 50 percent of the junction boxes walked down are identical in construction to the junction boxes qualified by the referenced WYLE report. The other types of junction boxes observed differed primarily in the method of box cover attachment to the junction boxes.
Junction boxes were observed of the lift - off hinge, clamp cover design similar to Hoffman Cat No. A-1412LP, and with gasketed screw covers similar to Hoffman Cat No A-12126GSC. For the lift - off hinge, clamp cover boxes, g the number of cover attachment clamps varied. The other basic box construc-t kj tion details (steel gauge, continuously welded seams, and neoprene gasketing to seal the cover) were similar to the NEMA 4 junction boxes qualified by the referenced WYLE report.
_ _ _ _ _ _ _ _ _ _ _ _ l
o .
Bechtel Power Corporation O
N./
Mr. 0.- D. - Kingsley, Jr.
Page 5 AP-9097-0063884 In the installed configuration, the junction boxes are vented through conduit entrances which will equalize the pressure in the junction boxes for a postulated LOCA design basis event. (Reference AP-3647 dated May30,1979). The differences in the attachment of the covers on the junction boxes should not affect the ability of the boxes to withstand the LOCA pressure profile. Therefore, the-environmental qualification of the junction boxes / terminal blocks documented in WYLE Report 44354-1 can be extended to cover the other types of-junction boxes observed in the March 1984 containment walkdown. Due to the differences in the box cover attachment methods, Bechtel is proceeding with additional seismic analysis of the various typical box configurations-observed in the containment walkdown to verify the seismic qualification of the boxes.
If you have any questions or coments, please contact us.
Yours very truly, M
K. C. Gandhi Project Engineer KCG/JEL/DGB:Is
Enclosures:
See List of Attachments cc J. R. Crane, w/l bec R. Poland L. B. Long, w/l J. E. Love, w/l J. M. Wheless, w/l D. G. Butani, w/l R. P. Mcdonald R. J.-Publ, w/l R. L. George,-w/l Jr. , w/l Ap.9097-B. D.
M. A.McKinney,1 Lalor, w/
D. H. Jones, w/l V. C. Valekis W. G. Hairston, 11, l
l U( D
LIST OF ATTACHMENTS Os ATIACHMENT #1 The States company Bulletin 4-TB 0063885 ATTACHMENT #2 Bechtel I.O.M. dated March 9,- 1984 from Sterling Creamer to Jease Love ATTACHMENT #3 The States Company letter dated March 14, 1984 from W. C. Wright to K. C. Candhi (Bechtel)
AWACHMENT #4 The States Company letter dated April 3, 1984 from W. C. Wright to K. C. Gandhi (Bechtel)
ATTACHMENT #5 Results of walkdown performed by Bechtel during period March 24, 1984 to March 28, 1984 to detemine old and new type NT blocks.
ATTACHMENT #6 General Electric letter dated November 27, 1973 along with qualification report "Teminal Block LOCA Test for Electrical Penetration Assembers" dated November 6, 1973.
ATIACHMENT #7 National Vulcanite Fiber Company Com=runication dated April 4, 1984 from J. Brabson to
- 0. D. Kingsley (APCo) regarding C-501 Phenolite Laminate Sheets.
Main steam line break temperature verus time O ATTACHMENT #8 profile for FNP v
.9 suLLETIN 4 73
.' @) The States Company A Division of Multi-Amp Corporation
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0063880 STATES @ TYPE NT AND ZWM TERMINAL BLOCKS C' 2' d,3 f ,I I. I g I Irl I I I l,1,.1,1,l,1 Ifif t,
[a$.S.Y ? $&.QL;UE,?* bk* 4 'r]$(.N.N,.l(l.
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Catalog No. M 25036 with Raised Marker Strip TERMINAL BLOCKS ARE AVAILABLE WITH 2 THROUGH 73 POLES APPLICATION This is the popular terminal block so widely acclaimed for its unique disconnect feature.
Designed to provide a junction between switchboard wiring and cable wires, the States Terminal replaces the standard stud and straight strap type of connection with its sliding link connection.
Easily and quickly operated, the sliding link provides the means for inserting an indicating .
Instrument or artificial load into the circuit without removing any wiring; Statese Terminal Blocks greatly simplif y systems checkout by the test technician and eliminatethe possibility of error in reconnection.
~
FEATURES
- 1. Sliding link-quickly opens and closes circuit to permit testing without disturbing any wiring.
- 2. Unit pole construction-up to 73 poles available.
- 3. Space saving-5/8" center-to-center between poles
- 4. High barrier between poles
- 5. Rated 600 volts,30 amperes
- 6. Marking strips or tags available-make coding of each circuit fast and easy.
- 7. Available as either front-connected or back-connected blocks
- 8. Heavy nickel-plated, brass contacts
- 9. Covers available (Copyright Multi- Amp Corp.,1981
O StiDiNG tiNx DISCONNECT
.. .s " .
Checkout circuits without disturbing '( %
9!N g'W,d.
- 1. , 0063887
~g j k?; *,( 1 ._
permanent wiring. Simply connect in-struments to terminal posts, loosen and -] s slide link open - take reading - slide r link back and tighten. Photo illustrates '\
marker strip swung out of way for W Y@g _ ~ l testing. < -
k(( .$.,r ,[g. ,f INSTALLATION States Terminal Blocks can be mounted in any convenient manner; however,they are usually installed on the back of a switchboard panel either vertically or horizontally. in applications where it is desired to mount the blocks on the front of the panel, they can be provided with feed through studs for connection to the wiring on the rear of the panel.To save the time of removing terminal nuts, this hardware is shipped loose in a bag. The nuts take a standard S/16" socket wrench. For drilling dimensions of both back- and front-connected blocks, see page 6.
OPERATION States Terminal Blocks are safe, convenient and simple to use. Barriers prevent shorting between poles, and there are no parts or wires to remove.To insert an indicating instrument or artificial load. the test leads. are first attached to the terminal studs of the block; then the normal circuit is opened by loosen;ng the clamping screw in the sliding link, The clamping scres may be operated with either a screwdriver or the same socket wrench used on the terminal nuts:
MARKER STRIPS OR TAGS PERMIT EASY CODING OF CIRCUITS To provide a ready means of coding each circuit running through the terminal block, a marker strip or individual marker tags can be provided. The marker strip can be furnished on any block having 3 or more poles, and is a strip 7/16" wide.The strip is hinged to the barrier and can be easily swung out of position so that the sliding link can be operated. Marker strips cre available with a white surface or, for etching purposes, as a black surface with white center. If desired, individual marker tags for each pole are availablein place of a marker strip.
A.m%ble in red or white, marker tags are mounted on the studs of the terminal.
Page 2 b
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4 0063888
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BACK-CONNECTED BLOCKS O Fftst r
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The back-connected blocks are constructed the same asfront-connected blocks except that the studs penetrate to the rear of the panel. Nuts and washers are supplied for use with the stud at the rear of the panel, and a terminal stud for connecting a test clip is at the front of the block. If your application requires, these blocks can be provided for front-connection at one side of each pole and back-connection at the other side.
Page 3
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0063889 O covens Covers are available for either front or back-connected studs in the end poles of the block by two captive, insulated knobs.
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, Q'-)'3;J,Ty' Block With Cover : ; t9 F' - -
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% Q1 %4 STRAIGHT STRAP When the disconnect feature of the sliding link is not required, the blocks can be with a straight-strap connection. These blocks have the same construction and dime as the standard blocks. Poles with straight-strap connection can be combined on the s ,
block with poles having the sliding link.
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NOTE in special applications where flame retardant properties are desired. StatesTermin can be provided with self-extinguishing barriers and marker strips Designated by th
ZWM", these blocks also include an Everdur bronze clamping screw inthe sliding lin extinguishing covers are available as an optional feature.
Continued . . .
Page 4
(
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t, .,
0063890-c SPECIFYING STATES TERMINAL BLOCKS "'
As this Bulletin illustrates. States Terminal Blocks are available in a wide variety'of e
configurations and _with many. optional features to suit your specific applications and- -
requirements.
All blocks are specified by a catalog number consisting of five digits,which may be preceded L
by any of severalletters to designate desired features. Use the following code to determine the catalog number of blocks having the features you desire.
SPECIFYING CODES PREFIXES-M: White Marker Strip .,
K: Black Marker Strip with White Center.(for engraving) / qi SM: Individual White Marker Tag FM: Individual Red Marker Tag B: Cover ZWM: . Self extinguishing barriers and Ma'rker Strip; Everdur Bronze Clampir Gerews FIRST 3 DIGITS--
250 = Sliding Link, Front-Connected 251 = Straight Strap, Front-Connected -
252 = Sliding Link, Front-Connected on Top, Back-Connected.-
'O on Bottom, Long Studs for insulated Panel Mounting -
253 = Sliding Link, Back Connected, Long Studs for Insulated Panel Mounting 254 = Sliding Link, Back-Connected on Top, Front-Connected -
on Bottom, Long Studs for Insulated Panel Mounting 255 = Sliding Link, Back-Connected, with Bushings 256 = Sliding Link, Back-Connected Top, Front-Connected ,
Bottom, Short Studs and Bushings 257 = Sliding Link, Front-Connected Top, Back-Connected a B,ottom, Short Studs & Bushings FOURTH DIGIT AND FIFTH DIGIT-Number of Poles in Block EXAMPLES-'
M-25012: Designates a 12 pole block with sliding link and white marker strip; in this case, M = White Marker Strip; 250.= Sliding Link Front-Connected; 12 = 12 poles: 3
- 8SM 25506: : Designates a 6 pole; back connected block with cover and white marker tags.
in this case. B = Cover; SM_= Individual White Marker Tag; 255 = Sliding 1 O Link, Back-Connected; 06 = 6 poles Continued . . .
- Page 5
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- 4. e.73- <nn esem .
3 , b,
.e* se ra is s e ., ir<*ao / 1. Both the Stit!!ng t_ ink and straight si s,4. ro v>e /re a, g' 3 j. strap types have same dimensions.
sr sis r E5Wn se Bho p,yy,eg peggg/} T ss as r 7"'e s 21*4e 2. To provide extra roounting support, ' sfr5 -iTFe n ~~;s7se'.* r se ss i rg.T'" s e.e ,_ 3 its D N at 26 poles oneit enk space is added*- l __ ] o is y, , r s - +1 res v* O et $1 poles, two tienk spaces are i ss, s ss iv 2, n is ,',,- ye iae ( edded. 1
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- 0063891
...v_ -- . -
ATTACmENT #2 Bechtel PowerCorporation O interoffice Memorandum
- 3. Jessie Love o.. March 9, 1984 "T terling Creamer S.V. Junction Box Qualifications ,
Farley Nuclear Project
-0063892 coces to At The S.V. Junction Boxes tested at Wiley Lab. for the Farley Nuclear Project were typical of the boxes approved for use in the containment at that time.- The terminal blocks were also.the approved type as manufactured by States._ The terminal blocks were black g with blYck barrier strip. At the time the only reason for the test was to qualify the existing installation. All existing installations at that time used only the blick with b1Ick barrier [ '
strips. Farley at that time did not use any States blocks with an off color barrier strip. (pJ 1 checked with Floyd Averill, Electrical Superintendent at the time and his recollection is the same as mine. He remembers the bicek numbers to be 25012 with 11 esignating the number of terminal points.
, & fW5 Sterling' Creamer O
ATTACHMENT #3 mc States g AogvisioN Dr MUL.Ti AMP CORPOR ATION cosem 0063893 O.'4 h 4 arti sen wu een w7s237 u s a tem s33 32os twx o,o-est9952 a .a m-Y-;
# W !. 11. 3. j %{~
[' Th~s ** ' * / v March 14, 1984 l cuit 'V lv[ 1
% $! I' L '6
, L.ncs.;us sa :
i dM f..V 3 m pg p i mcNr3CLsfJ G g 7357 03/20 A raac.uiets l : - r w esca i , BICliilt Becht Power Corporation tu ' 6@. 15 2 Shady Grove Road hersburg, Maryland 20877-1454 ' w ag ;._ 3 i , y i 1 ws spas, Attention: Mr. K. C. Gandhi $5lEtf ; > Project Engineer I SUIDECT: Joseph M. Farley Nuclear Plant Units 1 & 2 I
C"* '# *" ' "1 Bechtel Job 7597-038, States Blocks # * *# 1!E.9r (LS-83-066) Bechtel Files A-916 E-91 V-4087 A 4I(tsis,eQ Gentlemen:
1he following is sent in response to your telecopy and questions therein sent on March 12, 1984.
- 1. h7 blocks were first rdnufactured in Hartford, Connecticut O starting around 1926. The barrier used at that time and continued to be used until about 1973 was of a stamped can-vas base bakelite material - black. .
- a. Barriers on present day h7 blocks will have a color varying frcn black to dark and lighter grey depending on the color mix that the molder employs.
- b. Old barrier - canvas base bakelite, Grade C semi-gloss finish. New barrier - polypropylene Allied Che=ical Grade Fp-1080 flame retardant. Enclosed is a materials list for Z41 Terminal Blocks. hT is the same except for black (grey) barrier and Everdur bronze clag senw.
Material change occurred when it became cost prohibi-tive on stamped parts. We took a look at polypropylene ' , as an alternative because it offers superior break- , down protection as well as being flame retardant. This ' ' ' quality is a necessity for the ZhM and is used in a black colcr for hT. %
\
- c. Blocks have been manufacttned basietlly the same since about 1926. Materials and tools have been consistently upgraded through the years. Terminal Blocks are manu-factured under a quality contro' manual and must meet strict standards within the manual guidelines.
- continued -
.s a
0083894 O March 14, 1983 Bechtel pcuer Corporation pagel - - - Mr. K. C. Gandhi
- 2. 'Ihe actual date when M1 Temina'i Blocks were first' manufactured is difficult to pin down ' exactly. It would have been late'1949 to early 1950's. The original specifier was Con Edison Cogany_
of New York. They wanted an hT block with flame proof barrier and a clamp screw that didn't nist'. .The original barrier on M1 was " staged glass melamine. Because of glass melamine fibers" causing skin problems and the difficulty of obtaining good stagings we-again: decided to go with tcn-(buff) colored polypmpylene molded-barriers for Z21.
- a. As outlined above both black h7 and tan Mi barriers are made of polypropylene which is flame-retardant. We guarantee-that ZhM barriers will be flame-retardant. We may choose to go with a less expensive barrier without flame-retarding on h7 blocks if-it works to our advantage to do so.- This probably won't happen but since-it is not in the hT sweification that-all parts be' flame 3 retardant the option is thre. '
- b. hT and Zh! blocks are manufactured to the same Quality Assurance O program.
We are well aware that other panelboard builders,-utilities and -
-i Coment:
engineering service ccepanies have had the hT blocks qualified for nuclear applications. We chose to have our Mt block qualified for Class IE appli-cation-outside containment because it has flame-retardant barrier-as well as rust proof Everdur bronze clamp screws. I hope that the information given herein is sufficient. If we Wehave haveomitted a big gap . something critical to your problems solution let me know. of years to cover when discussing prior manufacturing procedures and materials,. but-1 feel that I've answered as accurately as possible. Yours very truly,
'lHE STATES CG!PANY Division of
.MJLTI-AT CORPORAT1W 7 ,
W. C. Wright product Mana er. WCW/ih enclosures O
'..' 0063395
#MTWN.dl misw.w.,o. .i.... tun. m.im mi.v.a. w eeu
( o..ea psuni amp wa. e eun
,s 2h?) TER11ML BLOCK >! alt.7t1ALS ). .,,,r s .
4s . o N4w %i fills 4I W '~ 2 tQjpg ?lgy,G U:N* FETAL PARTS 9 s' C///// #8 Y O 6,i \ All rurrent carrying parts are made of copper alloy. 'Ihey are nickel p a to standard comercial thickness. 1he current carrying parts are mounted on a base of molded phenolic to make up a teminal clement or pole. Thepolesareattachedbynickelp1Atedsteelscrewstogalvanizedsteelstripto make a terminal block asseY.bil . O Barriers between teminal elements are made of flame retardant grade polypropylene. CONTINIOUS llSE TDI'lIATURE RATINGS i .
] ! bided Base - }bterial: General Purpose Durez #701 Black i Temperature UL Rating 150 e i Fla m bility Classification: UL-94 YI, ASnl D-035-56T-Sc1r lixtinguishing l
- 'a rier - tbtcrial: Polypropylene. Allied Chemical Grade FP-1080 Flame Retardant.
a Continuous Use Temperature Rating - 1050c
- i Fla m bility - UL-94 VO. A53! D-635 Non Burning j or No)amnt Corp. Abplen Grade CRVD-8s Scaling Compound - Flitchell Rand }{fg. Corp. , Grade R-5770-FR-4
~
Flammability - UL94-VO ,,
!brker Strip - Ibterial: Laminated Ihlamine, - Grade 100 low Clare r- Rivet - }hterial: Nylon, Black
( hhx. Service Temperature 250 la 3000F
~>
~
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.' b,(kINbhhkk N$k. lk'* hhh,[.d$*b'.'Ifk(hkkkkhhh[h),.kd}$f L} . . ..
manufactured at Neal. West Virninia . OVamOnt COrpOrah.On , by NOVAMON7 CORPOR ATION ( 1114 Avenue of the Americas a subsidiary of MONTEDISON
. /, . \ New York. NY 1003G
(~ Telephone: (212) 730 2650 i
- . 0063896 I MOPLEN CRVO-8
. Ilent-Resistant Flame-Retardant Grade i
PROPERTIES TYPICAL DATA METilOD*
. CENERAL '
Flow llate, g/10 min . 8. 0 D 1238, L Density, 23C, g/cm3' l.30 D 792, A-2
; Water Absorption, % <0.05 D 570 Mold Sh rinitsge, in. /in. 0.010- D 955 0.020 MUCllANICAL Tennile Yielil Strength, psi 2750 D 638, Speed C Yietti-Point 1:longation, % '* 3. 5' D 63S, Speed C
, Izoal Impact Strength, 23Og notched, fi-lb/in. 0. 4 D 256, A i Elastic Modubis in Flexure, l "'., S c r a n t , p s i 360,000 D 790, 1,A
. Rockwell llardness, R Scalc 93 D 765, D
! . TilERMAL .
j Deflection Temp. Under Flexural Load, ., 66 psi, deg C 116 ., D 64S Melting Point, eleg C 168 D 2117 UL-91 Flammability Classification . 94 V-0 UL-Temperaturc Index . Ponding EL1 CTRICAL Diclectric Constant. 1 Mlly. 2. 5 D 150 - I)immipatinn Fat; tor, (X 10*4), 1 Mll., 5 D 150 ,,
- Latest ASTM Revision i .
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o n& U Durez' 791 Black Phenolic is a two stage, asbc:.tus free, general pt'rpose motding material.11 exhibits a ba'ance of mechanical and electrical properties plus versatile moldability which account f or its wide-1 spread use or many diverse applications. DurezS 791 Black is an " industry standard" f or GP phenol.c molding materials. , 3 .._ . MATERIAL PROPERTIES: MATERIAL TYPE: s: Bulk Factor 2.3 General Purpose Apparent Density (glec) 0.58 AST MType 2 Forrn of Materiat granular U.L Temperature Index of 150'C
]
a Feeding and Peelorming good
- one year Storage Life Plastit ities available f or comprest ion and transler molding.
a b . . .. . MOLDED PROPERTIES: _
. S International Conventional Units System of Units
)
Typical Typical Compression Compression U6
- Specific Gravity 1.3G Motding Shrinkage $ 0.008 infin 0.008 mim i
Tensile Strength 7.000 psi 48 MPa Flexuial Stiength 11.000 psi 76 MPa Compressive Stiength 32,000 '- psi 221. MPa Tensile Modulus 1.3 x 105 psi 9.0- GPa
] Jim
; hod impact 0.30 f t Iblin 16 i OcIlection Temperature 3M 'F 166
'C Water Absorption 0.70 % 0.70 -
l ) Compicssion properties detiermined with test specimens compression molded at 340*F. N Refer to introcluot. ion for ASTM test methods.
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&Typicat transfer molded shrinkage is 0.010in!in or mim.
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. 4 l .s' 791 BLACK '
j 0063898 PHENOLIC
, E EbkRICAL PROPERTIES: .
International i - Conventional Units System of Units 1!
,i l Typical Typical
, Compression Compression l Dielectric Stiength
, Shon Time 350 Vimil 13.8 MV/r Step by Step 275 Vimil 10.8 MV/r
' Dissipation Factor
] , @ 60Hz .00 .0G
@ 1KHz .04 .04 .
@ 1MHz .03 ,, .03 Dielecitic Constant
]
@ 60Hz 5.6 5.6
@ 1KHz 5.3 5.3
@ 1MHz 4.6 4.6 Volurite Resistivity 1 k 1052 ohmem 1 x 10 ohm :
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)llggglkgag+ ano rnno t.cas of sinsarl* amt haniti ng a e t+yeim one conteet No s.nigeshons os sututori osa nm an,itum; cen'a.nec he'ein.
lO> ItOOKEn CHCt.ilC ALS & PLA51tCS CORP. North lonawanda. New York 14120
. shan t,e consbuc<t as m icrommancahon tor its use wt entnngemeni ot any esist.ap patent *
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ATTACHMENT #4 1 o Q ' THE g g g COMPANY 0063899 A DIVI 5lDN Cf' MUL.Tl' AMP C DR#DM ATlDN a271e vae'.wr Ct'se %u1H210 s A_ (2'41333 320t l'.W L'O 66150!.2
/;ril 3,19E4 Be:htel Pcver Ce g erntica 15740 55.ady Creve Read Gaithersburg, Maryland 20877 1454 Attentien: Mr. K. C. Gcndhi Preject b.gineer St*EJECI: Jcseph M. Tcrisy Nu: lear Plcnt thits 1 & 2 Bechtel Jeb 7597-03B, States Biceks (LS-63 CE5) Bechtel Files A-915 E-91 V-4CB7 Gentic.en:
Ccnfiming c:::versattens with Ren George. Deng McKinr.ey cnd Mike Ialer of A! cts .a Fewer Ccgany en /gril 2 cnd April 3,1954 we effer addit $cnal in-fer.stien as fo11cus: According to the Isst svsihble I :rchese histcry ccid en file we su; plied States Terni*.a1 B1c:ks with TET54 !arrier; up to early 1573. TB 34 wcs sts ped cut cf C-501 F).enelite. C-501 Phene 2ite hcs hest resistence 'F shcrt time of 275 s.nd 'F centin'.cus of 225. Yours very truly, i ruit MI cy 1
, ,,3, . g ,, . g- 9f3 THE STATI.S COG /2# Divisien of c.m C PJ1.TI RO CORPORATICN i tacticosists Mmn:ctsy' R 4/1
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y'C. h. g, Wright
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'd$#[* Product Mcntger "lSL W /ih j[,h1_
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kECEWED BY TELECOPT in itt saca
. eitt APR 3 1934 p ses ro. n n E-91 V E -15' A-Y 7124'1T
ATTAOD{Eh7 45 s The following table lists the type of barriers identified on States TYPE NT teminal blocks during the walkdown conducted from March 24,1984 to _ March 28,1984. NEV TYPE NT WITH HOLDED OLD TYPI NT B14CK 1 POLYPROPYLENE C-501 PitEN0 LITE { EQUIPMENT PARRIER TPNS NO, _PARRIER X 11TB001 03 ll;, fr . . " l, * + ' ' _ _ X - --- 004 . . . . _
~
/ // .' X 21TB001 - - " ' ~
X 002 003 004 j gfy ,) X X X 005 ; &, y ,e.f ;c - 31TB001 l [f4 <: 4 /e. X 002 X s A1TB007 X O B1TB025 Q1B13G001-B X X Q1B135V2213A-A/JB X SV2213B-B/JB X SV2214A-A/JB X Q1B13SV2214B B/JB X X N1B135V0444BA-B/JB X 0445AA-A/JB 8047-B/JB X .. Q1E12SV3999A-A/JB Not walked down 3999B B/JB Not walked down X NiE21SV8149AA-A/JB > X 8149BA-A/JB 8149CA- A/JB X 8871-A/JB X X Q1G21SV3376-B/JB X NIG21SV1003A-A/JB X 7126-A/JB 7 Q1P135V2867D-B/JB 2866D-B/JB X X 3196-B/JB X 3197-B/JB d(%
ATTACHMENT #5 (erntinusd) 0063901 NEW TYPE NT i VITH TOLDED OLD TYPE NT BLOCK C-501 PHENOLITE O EQUIPMENT TPNS NO, POLYPROPYLENE RARRIER RARRIER Q1P155V3103-A/JB X 3104-A/JB X 3179A-A/JB X 3179B A/JB X Q1P155V3179C-B/JB X 3180A-A/JB X 31808 A/JB X 3180C B/JB X 3181A-A/JB X 3181B A/JB X 3181C-A/JB X 3765-A/JB X 3766-A/JB X Q1P17SV3184-B/JB X 3443-A/JB X O O r
20# 910/02/' ' It:91 00/t0
- ' , 0063902 ATTACHIE!?I 6
( GENERA 1. % E!.ECTRIC """"** ' O A ggie
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WAnnsttNo c$rAmtugw? Otwin AL t.f tiesc CL'4 sad.173 gg erwtat Aggwg, SAN ,0$t C ALtages:r...ut.,,,,..... .o.n. m ..... :
. l November 27, 1973 f.h $ H. Castner = Colu,mbla Y sp . t.
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Mr. D. T. Jene s Bechtel Power Corporation 5 MM g P. C. Box 607 g g Gaither s bur g, Maryland 2076o h(9 8' c gg,g;' . 40V 2 91973 E.1. Hatch Nuclear Plant Unit '
Subject:
Terminal Block Enviter.rnental Test _!OS 6521 _ f Refer ence: Bechtel Letter dated / ugust 31, 1973
Dear Mr. Jones:
Enclosed are two copies of the Terminal Block LOCA Test Report you requested. O ~ As you can s ee, the r esa.its mere t,han meet your requir ements, se e.vpected. . Approval of this document will enable Generai riectric to ship penetrations X.102 A and X.101A when completed. Penetrations X 105A and X.105C M11 remain on hold until the short circuit test. schedated in December, is c omple t e d. . If you have any questions, please contact me. ." .
.;., g .,
, w n g: . 2 Very truly your s. , 'j,"", l _' - J
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--0063903
) Terminal 31ock LO*A Test J Tor Electrical tenettstion Assemblies hY R. H. $chuster 11-6-73 General Ele:Cric Company b'F.$D_- C&1 Engint.ering Peripheral tyJtpsent l'igineering i 4 e I I I L .
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0063904 l 1.0 - Pl%50!! The purpose of this test is to determine the ef fecf C.E. and States type terr.inal blocks, < 2.0 PJttuurT S tetter free techtel Power Corporation to P.r. W.1. Cleon dated Augu t 31, 1973. 3.0 $1M103 Of US'." T$ '
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3,1 leaults - This test detenstrated that during MCA conditions the insuls-tien teststance en 10 beihitypes of ter= inst 1plocre vould decreast ohu to approxi=stely 2r40' ohns. After fres greater than 10 cec;1ttien of testing the tesulation resistanc 3.1 Ceet!ustett The subjected results of thiscenditices to LOCA test eheved theirthat if the resistance insulation terr.ir.e1 tcanlock.s be Hevever the expected t e rr.tn ti to drop to 4;proxiestely 2.0x10' chu . blocks vil g% of insulatica resistance once the steas. environment is f.ach type of block showed no deterioration af ter testing except for sete slight discolcrati:n of the phencite material. 4.0 T!S- PPar!?"U 4.1 1,s,sj C ue ui t M a r r n . . I LP. . L
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g 'Q* 0063905 a 4.2 Des crittien of Tett d Two adjacent tercinals of each terminal block ldvere connecte to an IR rack with f16AW Vire passing through two sca e(See fes ports in the pressurk vessel. l The insulation resistance vu measured between th with 500 vie power supply at sattent condition. The terminal
- blocks vers then subjected to the 1.0CA condition a shown in Table 1. The insulation resistance was recorded at least on h ,
a day and at each significant ter perature condition during t e Af ter coepistien of the 10 day test the cover f final was re-test. moved and the vessel was left open for 36 hours See Test be ore insuistion resistance sessurements were recorded. Dats Sheet for specific values. TU'.I 1 . 320 260 320 340 260 TD:PIF.ATL7J 'T 73 21 21 75 103 PR.t$5LT.I P31C 100 100 100 100 100 RnJ.Tivt MLHIDITY Z 4.5 hrs 8 days 1.5 days 1.$ hrs 3 hrs DL7.A* ION 4.3 Teet t e ut e:e e t itessure Vessel IF, Asek tarperature prote Chr nel Ale et 7ccrerature Centro 11er C.I. Ter inal licet CP,151
- States, Co. Terr.inal Block type N.T.
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