ML20215A322
| ML20215A322 | |
| Person / Time | |
|---|---|
| Site: | Seabrook  |
| Issue date: | 09/30/1986 |
| From: | Woodward N ABB IMPELL CORP. (FORMERLY IMPELL CORP.) |
| To: | |
| References | |
| OL-1-I-NCNP-007, OL-1-I-NCNP-7, NUDOCS 8612110247 | |
| Download: ML20215A322 (43) | |
Text
,
1 hff Public Servico Company Of'NowNmpshiro S EA B R O O K. ST ATIO N 00CMfifp Lmi!-C E DEC -8 P7 :16 ENVIR.ONMENTAL QUALIFICAT~ ION OF 74 ma ELECTRIC AL E.QUIPMENT Electrical Equipment Qualification File flo.: 174-15-01 Revision 2 9
Purchase Order flo. :
9763-006-l'74-15 Manufacturer:
Transamerica Delaval, Gems Sensor Div.
Model Number:
Transmitters:.u-54852, XM-54853 Equipment Type:
Level Transmitter u
I RECETVED-D. C. C..
800UH1091$0Dir0168H1 APR 291986 SEABROCISTATION
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Impell Approval batd SL J Sw wr>O W2Vb4 YAEC ApprovN1 Date 8612110247 860930 PDR ADOCK 05000443 G
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Record of Revisions Revision Description Date 0
Original Issue 12/2/85 1
Revised Table of Contents; 4/10/86 Equipment Summary Evaluation, pp. 1, 2; QEWS; E.Q. Assessment Report, pp. 1-12; Added References 5, 6, 7 2
Table of Contents; QEWS; 4/25/86 Revised E.Q. Assessment Report, pp. 1, 3, 7, 10, 11, 12; Reference 3 3
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0137I Page 2 of 3
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Electrical Equipment Qualification File No. 174-15-01 Revision 2 TABLE OF CONTENTS Title Equipment List Equipment Summary Evaluation Qualification Evaluation Worksheet Environmental Qualification Assessment Report (Checklist)
LIST OF ATTACHMENTS Reference Title 1.
Transamerican Delaval Inc. Gems Sensor Division's Quotation No.
1073-C.
2.
Wyle Laboratories: Nuclear Environmental Qualification Test Report No. 45700-2, dated Dec. 14, 1982.
3.
Impell Calculation No. 0570-032-067, Rev. 1.
4.
Record of Conversation between B. Meyer (Gems) and A. Biswas (Impell), dated 8/28/85.
4 5.
Seabrook Station Environmental Qualification Field Walkdown Verification Sheets.
6.
PSNH Letter SB-20380, dated 1/29/86.
7.
UESC Engineering Change Authorization (ECA) 50/11383C.
j 0137I Page 3 of 3 l
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008 NO. 9763.102 PUBLIC SERVICE OF NEW HAMPSHIRE e
OWG. 9763-M-3OO218 HARSH ENVIRONMENT EQUIPT LIST SEABR00K STATION REV. 001 SORT No. 05 SHEET 64 UNIT 1
DATE 10/07/85 E.Q. FILE NO.*
174-15-01 REV EQUIPMENT 10 SERVICE LEGEND MANUFA':TURER BLDG EQ FILE NO SAFETY FUNCT OPER EVENT A.
NO MODEL NO ENV ZONE PO NO R
CODE CODE (D
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.................................................................................................O 001 CBS-LE
-2384-1 CNTN BLDG LVL GEM g
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LOWER SENSOR 191622 XM-54852 CS-10 174-15 m
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-2384-2 CNTN BLDG LVL GEM CNT BLOG 174-15-03 PAN A
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UPPER SENSOR 111623 XM-54853 CS-to 174-15 "C
...............................................................]*
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-2385-1 CNTN BLDG LVL GEM CNT BLDQ 174-15-05 PAM A
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-2385-2 CNTN BLDG LVL CEM CNT BLDG 174-15-05 PAM A
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UPPER SENSOR 191623 XM-54853 CS-10 174-15
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' Electrical Equipment Qualification File No. 174-15-01 Revision 1
- .I EQUIPMENT SUM ARY EVALUATION (continued) 4.0 Discussion The test report (Reference 2) includes qualification of both the Level Transmitter and receiver.
It may be noted that the receiver has been qualified for a total radiation dose of only 1100 rads (Reference 2, p. II-8) and a temperature of 104 F.
Therefore, the receiver must be located in a mild environment without exceeding the above radiation and temperature limits.
The manufacturer indicates a receiver life of 10 years.
The Level Transmitters are, however, qualified for the plant life of 40 years (Reference 2, p. iii, XIV-15 and XIV-35), plus one year following an accident (Reference 4).
The accuracy of the equipment has been detemine'd to be +3% of full scale meter based on the review of the data sheets Tn various sections and the statement given in paragraph 3.0 "Results" of Page XII-4 of the test report (Reference 2).
The test data (Alarm output, slave meter and receiver meter sadings) obtained during the LOCA/MSLB testing are not
. included in the test report.
The test report (Reference 2) cited several anomalies during the themal aging test. However, the total required test duration was maintained and therefore these anomalies do not affect qualification.
The accuracy of the tested Level Transmitters is + 3% of Full Scale. Seabrook acceptance of the accuracy is giVen in i
Reference 6.
Qualified Raychem WCSF-70/250-N Heat Shrinkable tubing or
/
equivalent splicing material must be used to insulate the splices between the transmitter pigtail and the interconnecting r
cable at the J-Box. Per Reference 5, WCSF-N splices were j
installed.
4 1
4 0137I Page 2 of 2 5
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QUALIFICATION EVA ON WORR SHEET Public Strvice Lompany of New Hampshire Pr2 pared By: d,o., <?, / O, Dm:
Seabrook Station
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D:cket: 50-443 EQUIPNENT QUALIFICATION FILE NO. 174-15-01 Checked By:
x x b, u d M Date: d [ 3/f4 g
y Postulated Environment Qualf fled Environment Qualifica tion Outstanding Equipment Description Pa rameter value Reference value Reference Method items Purchase Order No.:
9763-006-174-15 Opera ting 1
2 Test and Time 1 year
- p. I 1 year
- p. XII-7 Analysis None Equipment ID No(s) :
3 CBS-L E-2384-1 CBS-LE-2384-2 CBS-L E-2385-1 Peak 1
2 CBS-L E-2385-2 Tem rature 375
- p. I 400
- p. XII-7 Test None OF)
Peak 1
2 Equipment Type: Level Pressure 60
- p. I 66
- p. XII-7 Test None Transmitter (Psig)
Manufacturer:
Relative 1
2 Transamerican DeLavel Humidity 100
- p. I 100
- p. XII-3 Test None Cems Sensor Division
(%)
Model Number:
XM-54852 XM-54853 Chemical Boric Acid 1
Spray (rH) 1.2%
- p. I 1.72%
- p. XII-1, XII-4 Test None pH 7.5?
pH 8.5 - 11.0 4
Accuracy: Spec: + 3%
Demon: -+ 3%
40 Year Normal I
Radiation Dose 2 x 107
- p. 1 2
(Rads) 2.0 x 108
- p. II-3 Test None 1 Year Accident I
Limiting Environment:
Radiation Dose 1.04 x 108 p, j (Rads) location: Containment Bldg. CS-10 Aging 1
2 Test and Rad 7ene: Containment (OF/ Years) 120/40
- p. I 120/40 3
Analysis None Bldg. (General Area /
Not Submerged)
Lowest Elevation: (-J21'-
2 5/8" Test and Flood Level:
(-)20'8" Submergence 1 Year 5
1 Year 6
Analysis None Above flood Level: No Note 1 Doct. mentation
References:
Notes:
1.
UE&C Drawing No. 9763-300219, Service Environment Chart, Rev. 17, dated 7/22/85.
1.
Equipment I.D. Nos. CBS-LE-2384-1 and 2.
Wyle Laboratories Test Report No. 45700-2. dated 12/14/82.
CBS-LE-2385-1 only are submerged.
3.
Impell Calculation 0570-032-067 4
Seabrook Station Equipment Qualification file No. 174-15-01. Check 11st Note 6.
5.
58U-96263, Seabrook Station Flooding Study MatriF.
1 6.
Seabrook Station E.Q. File No. 174-15-01 Checklist Note 11.
Revision 2 f013tl Page 1 of 1
Public Service Company of New Hampshire E.Q. Assessment Report Seabrook Station E.Q. File No. 174-15-01 Impell Job No. 0570-032-1661 ENVIRONMENTAL QUALIFICATION ASSESSMENT REPORT Manufacturer:
Transamerica Delaval-Gems Sensor Div.
Model Number:
XM-54852, XM-54853 Component:
Level Transmitter Reviewer's Conclusion i
I Acceptable (i.e., this equipment meets the requirements of NUREG-0588, Category I) lXl Acceptable, providing the following special conditions are addressed Special Conditions:
The level transmitters passed a 30 minute submergence test with an equivalent 15-16 ft. of H O head. Plant I.D. Nos. CBS-LE-2384-1 and 2
CBS-LE-2385-1 are submerged subsequent to a LOCA.
The lowest point of this equipment where water might enter is the 0-ring joint where the stem assembly connects to the junction box, which is located 6 5/8" below the flood level (Reference 5). Therefore, this equipment may be exposed to less than 0.5 psi of water head where submerged.
UE&C Engineering Change Authorization (ECA) No. 50/11383C (Reference 7) provides details for the prevention of moisture intrusion into the level transmitters when they are submerged.
Filling the units with Dow #710 silicone oil will result in a pressure head of 4'-6" of oil (the height of the tee oil fill point above the postulated flood level of (-)20'-8").
This pressure head will counteract the less than 0.5 psi pressure head caused by the postulated flood [(-)20'-8" vs. (-)21'-2 5/8"] and prevent any water from entering the threaded connections and junction box for as long as this equipment is submerged.
Compliance with this ECA will ensure acceptable environmental qualification. Upon compliance this.special condition will no longer be applicable.
Coments:
None.
Prepared By:
M A /Lv 9'/>3//"6
/ Signature,
'Date Checked By:
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Signatur 7 9 Date
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Approved By:
/ 'ch dd-(
3 Signature Dtte Revision 2 0145I Page 1 of 12 l --
4 Public Service Company of New Hampshire E.Q. Assessment Report Seabrook Station E.Q. File No. 174-15-01 Impell Job No. 0570-032-1661 TABLE OF CONTENTS Title h
Maintenance Reoutred to Maintain Qualified Life 3
Documents Reviewed for This Report 3
NUREG-0588, Category I Qualification Report Review Checklist 3
Notes 9
LIST OF FIGURES i
Figure Title Pajyt II 1
Temperature Profile Comparison 12 I
l Revision 1 0145I Page 2 of 12
Public Service Company of New Hampshire E.Q. Assessment Report Seabrook Station E.Q. File No. 174-15-01 Impell Job No. 0570-032-1661 MAINTENANCE REQUIRED TO MAINTAIN QUALIFIED LIFE None cited.
DOCUMENTS REVIEWED FOR THIS REPORT 1.
Transamerica Delaval Inc. Gems Sensor Division's Quotation No.
1073-C.
2.
Wyle Laboratories: Nuclear Environmental Qualification Test Report No. 45700-2, dated Dec. 14, 1982.
3.
Impell Calculation No. 0570-032-067, Rev. 1.
4.
Record of Conversation between B. Meyer (Gems) and A. Biswas (Impell), dated 8/28/85.
5.
Seabrook Station Environmental Qualification Field Walkdown Verification Sheets.
6.
PSNH Letter SB-20380, dated 1/29/86.
7.
UE8C Engineering Change Authorization (ECA) No. 50/111383C.
- 8.
UE&C Drawing No. 9763-F-300219, Rev. 17, Service Environment Chart, dated 7/22/85.
- 9.
SBU-96263, Seabrook Station Flooding Matrix, 10/25/85.
- 10.
UE&C Drawing No. F-6.01.00.00, Calculation Matrix.
- Indicates a Generic Reference and is not contained in this file.
Revision 2 0145I Page 3 of 12
i Public Service Company of New Hampshire E.Q. Assessment Report i
Seabrook Station E.Q. File No. 174-15-01 Impell Job No. 0570-032-1661 l
-NUREG-0588, CATEGORY I QUALIFICATION REPORT REVIEW CHECKLIST l
1 lYES NO NA REFERENCE l
I. SIMILARITY l
I 1.
Have all Equipment ID's on X
l lQEWS l
the Master List associated l
l
' Note 1 l
t with this EQ File number l
l l
[
l been addressed in the l
l l
l l
documentation?
l l
l l
l l
l l
2.
Is the documentation trace-lX l
Note 1 l
t able to the plant equipment? l l
l ll l
t i
I I
I r
II. SIMULATED SERVICE CONDITIONS AND l
l l
TEST DURATION l
l I
l 3.
Do the temperature / pressure /
X lSee Figure I humidity test parameters l
lRef. 2, p. XII-7, meet or exceed the postu-l l
llXII-3 l
lated accident environmental l
l conditions? Make a copy of ll l
l the test temperature enve-I l
l 1
lope and superimpose it on I
the required accident envi-
)
ronmental envelope. Assure l
l l
that deviations between the ll l
l I
two are justified in the l
l l
l documentation.
l l
l l
l l
l 1
l t
4.
Do the margins of the test IX l l
liRef. 2, p. XII-7 l
[
profiles over the plant l
l
' Note 2 l
specific profiles conform to l
l I
t those suggested by IEEE l
l l
323-1974 and any applicable l
l l
f daughter standard for this l
I l
l l
equipment.
I l
l i
l l
l 5.
Does the test operating time l X l lRef. 2, p. XII-7 l
under the harsh environment l l
l lRef. 3 l
equal or exceed the equip-l l
l l
l ment's required operating l
l l
time?
l l
l l
I l
l l
l l
l l
I 1
I I
I Revision 1 I
0145I Page 4 of 12 j
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Public Service Company of New Hampshire E.Q. Assessment Report
]
Seabrook Station E.Q. File No. 174-15-01 Impell Job No. 0570-032-1661 NUREG-0588, CATEGORY I QUALIFICATION REPORT REVIEW CHECKLIST (continued)
IYES NO NA REFERENCE 1
l III. RADIATION 6.
Does the radiation dose.
X i
Ref. 2, p. II-3 1.e., integrated dose, for I
normal operations and acci-l dent dose for the plant.
l 1
fall within the envelope l
l l
used in qualification?
ll l
1 I
ll I
7.
Does the total integrated X
l Note 3 dose include Beta radiation?
l (Is Beta radiation ad-I dressed?)
l I
I l
IV. AGING l
l.
ll I
l l
l 8.
Are the thermal aging para-lX l lRef. 2, l
meters chosen and used in thel l
ll lp. XIV-35, IV-1 l
test supported by adequate l
l l
documentation or references? l l
l l
l l
9.
Was mechanical and/or elec-lX l
lRef. 2, p. IV-1 trical cycling addressed?
l 1
I l!
10.
Is the qualified life (QL) lX Ref. 2, p. XIV-35 1 explicitly stated?
I Note 4 t
l 1
- 11. Does the qualified life take l lX Note 5 l
into account the normal I
l operating state of the l
1 equipment (i.e., energized)? ll l
l l
l l
V. CHEMICAL SPRAY l
l l
l 1
l l
l l
- 12. Does the DBE qualification X
lRef. 2, p. XII-1,1 testing include chemical l XII-4 I
spray?
l l
- 13. Does the spray concentration X
Ref. 2, p. XII-1,l and pH used in tests meet or l' l
.l XII-4 exceed those to be used for l l
l the plant?
l l
l l
l l
l 1
I Revision 1 0145I Page 5 of 12
Public Service Company of New Hampshire E.Q. Assessment Report Seabrook Station E.Q. File No. 174-15-01 Impell Job No. 0570-032-1661 NUREG-0588, CATEGORY I OUALIFICATION REPORT REVIEW CHECKLIST (continued)
YES NO ! NA REFERENCE I
- 14. Was the spray testing done
'X l
l lRef. 2, p. XII-1, I
while under the extremes of I
l XII-4 pressure and temperature?
l l
i l
l I
l l
VI. SUBMERGENCE l
f
- 15. Does the test program include.'X llRef. 2, p. XII-3
/
submergence tests?
l Note 11 1
VII. SEISMIC l
l l
\\
t
- 16. Was the seismic testing /
X Ref. 2, Sect. X analysis done on aged l
component or equipment?
l 1
-l l
l i
- 17. Did tne seismic testing /
lX ll l
analysis address effects on I
i age?
l l
- l l
l 1'
l VIII. FUNCTIONAL REQUIREMENTS l
l
{
l I
i
- 18. Does the test plan / report
'X l
l 1Ref. 2, p. XIV-9 l criteria for equipment l
l l
l specify an acceptance l
I l
l performance?
l l
t l
l 1
l
- 19. Was an initial base line lX l
l l Ref. 2, Sect. I l
l test done to establish l
l l
l i
reference performance char-l l
l l
l j
acteristics?
l l
l l
l l
t l
20.
Is the accuracy demonstrated I X l
l IRef. 2 l
l during testing equal to or l
l l
l Note 7 l
better than that specified?
l l
l l
l 1
l i
- 21. Has the test / analysis esta-lX I!
l l Note 7 blished that this equipment l
l l
l can meet plant application l
l l
l l
l specific performance re-l l
l l
l l
quirements? (e.g. accuracy l
l l
l i
response time) l l
l l
l I
l l
i Revision 1 l
0145I Page 6 of 12 j
.___-,--__.--_-.]
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Public Service Company of New Hampshire E.Q. Assessment Report Seabrook Station-E.Q. File No. 174-15-01 Impell Job No. 0570-032 1661 NUREG-0588, CATEGORY I QUALIFICATION REPORT REVIEW CHECKLIST (continued) lYES I N0 1 NA I REFERENCE l
1 1
I I
I 22.
Review the test results on a l X l l
lRef. 2 Table I, I relative comparison basis l
l l
lp. iii, p. IV-4 I (i.e., performance para-l l
l Ito.IV-7 l
meters of the baseline tests l 1
l l
l Versus those during the l
l l
l l
various tests). Were there l
l l
l l
any anomalies or major l
I l
I l
discrepancies?
l 1
l l
l 1
I I
I I
23.
If so, was it satisfactorily l X l l
lRef. 2, p. IV-4 l
explained in the report?
I l
l lto IV-7 l
l 1
1 I
I IX. SEQUENCE l
l l
1 l
1 1
1 l
1
- 24. Was the same test specimen IX l
l lRef. 2, p. iv i
subject to the entire test I
l l
l Note 8 l
sequence including aging l
I I
l l
tests?
l l
l l
l l
1
-l l
l I
25.
Compare the test sequence
!X l
l l Note 8 l
l-~
performed for.this report i
i l
l l
l against your understanding l
l l
l l
i' of what test and procedures l
l l
l l
are required as per IEEE,
I I
l l
l 323-1974 and any applicable l
'l l
l I
daughter standard for this l
l l
l l
equipment.
Do you believe l
l l
1 l
the report meets the intent l
l l
l l
of these standards?
l l
l 1
l l
I I
I I
X. TEST SET-UP l
l l
l l
l l
l l
I
- 26. Was the test measuring IX l
l lRef. 2 i
equipment (TME) calibration l
l l
l Note 10 l
addressed in the report?
l l
l l
l I
I I
I I
XI. MAINTENANCE REQUIREMENTS l
l l
l l
1 I
l l
l
- 27. Are maintenance requirements l l
lX l
l and component replacement i
l l
l l
intervals specified to I
i l
l I
maintain qualified life?
I I
l l
l l
l l
l l
Revision 2 0145I Page 7 of 12
Public Service Company of New Hampshire E.Q. Assessment Report Seabrook Station E.Q. File No. 174-15-01 Impe11 Job No. 0570-032-1661 NUREG-0588. CATEGORY I QUALIFICATION REPORT REVIEW CHECKLIST (continued)
IYES NO NA REFERENCE 1
1 XII. INSTALLATION INTERFACES I
ll 1
l l
- 28. Have installation interfaces X
l Ref. 2, p. XII-3 required to maintain I
Note 9 qualification been identified!
l l
l in the test report?
l I
l If yes, explain in a note.
l l
l l
l
/
29.
Has the actual plant instal-I X l
.l Ref. 5 1ation been identified and l
evaluated?
l I
I I
I I
I I
1 I
I I
ll l
l l
L I
I L
I i
l l
l l
I I
i 1
I I
I I
I L
l l
ll l
l l
l l
I!
ll 1
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l 1
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1 1
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I I
Revision 1 0145I Page 8 of 12
Public Service Company of New Hampshire E.Q. Assessment Report Seabrook Station E.Q. File No. 174-15-01 Impell Job No. 0570-032-1661 NOTES 1.
Based on Gems Sensor Division's Quotation (Reference 1) and Reference 5, the Seabrook level transmitter model Nos. are XM-54852 I
and XM-54853. Wyle Test Report No. 45700-2 (Reference 2) indicates that the test transmitter model No. is XM-54854.
Reference 4 establishes the similarity between these models and therefore the test report (Reference 2) is applicable.
2.
The required margin of 10% of gauge for pressure is met (Reference
~
2, p. XII-7). Although the test profile did not fully envelope the postulated temperature profile for the entire duration, the actual temperatures recorded during the test (Reference 2, p. XII-7) exceeded 4000F and the temperature transient was applied twice which is representative of applied margin.
3.
The equipment was irradiated with a total gama' dose of 2.0 x 108 rads.
However, the Seabrook total integrated normal plus accident radiation dose is 1.24 x 108 rads which includes beta radiation.
(The use of the not submerged specified beta and gama accident I
radiatien dose is more conservative that. the specified submerged accident dose [ Reference 8]).
Since beta is considered less l
penetrating than gamma radiation, this above tested gama radiation i
dose is amply greater than the postulated accident gama plus beta l
dose. Therefore, it is concluded the tested gama dose is adequate for this qualification.
i 4.
The qualified life can be determined using a form of the Arrhenius equation as shown below:
Ln (X /X ) = (A/K) * [(1/T ) - (1/T )3 1 2 1
2 Where X1 = service time (hours)
X2 = test time (hours)
T1 = service temperature (OK)
T2 = test temperature (OK)
A
= activation energy (eV)
K
= Boltzmans constant = 8.617E-5 and XI is greater than X2 T1 is less than T2 Solving for X1 results in the following equation:
XI=X2
- Exp [(A/K) * ((1/T ) - (1/T ))3 1
2 l
Revision 1 0145I Page 9 of 12
o Public Service Company of New Hampshire E.Q. Assessment Report Seabrook Station E.Q. File No. 174-15-01 Impell Job No. 0570-032-1661 NOTES (continued)
Substitute the following values into the above equation.
A =.78eV (Reference 2, p. XIV-35)
X2 = 2161.3 hours3.472222e-5 days <br />8.333333e-4 hours <br />4.960317e-6 weeks <br />1.1415e-6 months <br /> (Reference 2, p. XIV-35)
T1 = 1200F = 321.890K T2 = 2480F = 3930K (Reference 2, p. XIV-35)
Solving for XI = 40.00 years 5.
The equipment when energized carries very low current (4-20 mA) and therefore the heat rise is negligible.
i 6.
Spray solution concentration used in the LOCA test is.28 molar Boric Acid. To convert to percent by weight the following procedure can be used:
.28 moles / liter x 61.8 grams / mole x 1 liter /1000 grams x 100% =
1.73% by weight This is more severe than the Seabrook requirement of 1.2% by weight.
7.
The accuracy demonstrated during the environmental testing was +3%
of full scale meter and +3% of full scale high and low alarm set points (Reference 2, p. T-1, II-12 to II-35. III-5, V-9, VII-5, VIII-10 to VIII-48 IX-5, XI-5, XII-4, XII-15, and XIII-5.
Seabrook acceptance of the accuracy is given in Reference 6.
8.
The test specimen part No. XM-54854 was subjected to the entire test sequence. This can be verified by a review of the data sheets in various sections of Reference 2 test report. Justification for performing the radiation exposure prior to thermal aging is as follows.
Testing sponsored by the Nuclear Regulatory Commission (NRC) and reported by Sandia Laboratories has shown radiation prior to thermal aging to cause some polymers to degrade to a greater extent than I
when irradiated following thermal aging.
The report states:
The mechanistic postulate is that radiation-cleaved bonds, in the form of radicals, react with oxygen to give degradation products, including peroxides. The peroxides are chemically weak links which are susceptible to thermal cleavage.
This thermal peroxide cleavage gives more radicals which, in the presence of oxygen, lead to more degradation and more peroxides. Thermal aging prior to irradiation does not substantially disrupt the polymer's original molecular 0145I Revision 2 Page 10 of 12 i
)
m' Public Service Company of New Hampshire E.Q. Assessment Report Seabrook Station E.Q. File No. 174-15-01 Impell Job No. 0570-032-1661 L
NOTES (continued) i structure over the normal elevated temperature ranges which, in turn, results in a lesser degree of degradation than may be expected in actual plant applications. Thus, the amplification of the degradation process caused by the thermal peroxide cleavage must be accounted for by performing normal radiation prior to thermal aging.
Subsequent testing by Sandia Laboratories, as reported in SAND 80-21496 establishes performing thermal aging after irradiation' as the only method in which to account for the strong synergism due to
, ~,
radiation and high temperature found in some polymers.
"The joint effect of gamma radiation and elevated temperature was also found to occur when the two environments were applied in a sequential fashio,n, but only when the experiments were performed in that order:
i radiation at room temperature followed by elevated temperature."
P Because of the test results identified above, the decision to l
I perform radiation prior to thermal aging is considered valid.
t 5
9.
Raychem WCSF-70/250-N heat shrinkable tubing or equivalert splicing material must be used to insulate the splice between the level transmitter cable pigtails and the interconnecting cable inside the J-Box of the transmitter. Per Reference 5, WCSF-N splices were installed.
I
- 10. A review of the various sections of the test report (Reference 2) shows calibration and calibration due dates for the instrumentation.
- 11. The level transmitters passed a 30 minute submergence. test with an I
equivalent 15-16 ft. of H O head.
Plant I.D. Nos. CBS-LE-2384-1 and 2
CBS-LE-2385-1 are submerged subsequent to a LOCA.
The lowest point of this equipment where water might enter is the 0-ring joint where the stem assembly connects to the junction box, which is located 6 5/8" below the flood level (Reference 5).
Therefore, this equipment may be exposed to less than 0.5 psi of water head where submerged.
UE&C Engineering Change Authorization (ECA) No. 50/11383C (Reference
- 7) provides details for the prevention of moisture intrusion into the level transmitters when they are submerged.
Filling the units with Dow #710 silicone oil will result in a pressure head of 4'-6" of oil (the height of the tee oil fill point above the postulated _
flood level of (-)20'-8").
This pressure head will counteract the less than 0.5 psi pressure head caused by the postulated flood
)
[(-)20'-8" vs. (-)21'-2 5/8"] and prevent any water from entering I
the threaded connections and junction box for as long as this equipment is submerged.
Compliance with this ECA will ensure acceptable environmental qualification.
Revision 2 j
01451 Page 11 of 12 f
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