ML20212A007
| ML20212A007 | |
| Person / Time | |
|---|---|
| Site: | Hatch  |
| Issue date: | 04/30/1986 |
| From: | GEORGIA POWER CO. |
| To: | |
| Shared Package | |
| ML20211R058 | List: |
| References | |
| NUDOCS 8607280093 | |
| Download: ML20212A007 (10) | |
Text
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ENCLOSURE 2 i
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Georgia Power Company 4
Edwin I. Hatch Nuclear Plant 3
i Unit 1 !
I Docket No. 50-321-l l
t Reactor Containment Building l
1
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"As Found" Condition
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! April 1986 .
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I 8607280093 860718 i PDR ADOCK 05000321 (
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HATCH NUCLEAR PLANT, UNIT 1, "AS FOUND" LEAKAGE CONDITION In accordance with the guidance of US NRC IE Information Notice 85-71, the following is the "as found" condition for the Unit 1 Integrated Leakage Rate Test (ILRT) completed on April 19, 1985, at the Edwin I. Hatch Nuclear Power Plant.
Following are the values for containment leakage expressed in weight percent per day.
Allowable leakage, La 1.2 vt%/ day Upper confidence limit for Mass Point Leakage Rate 0.611 vt%/ day Type B and C (as found) minimum pathway leakage (h718h acem) 0.927 vt%/ day As found (constructed) Type A leakage 1 538 vt%/ day Of the h7184 acem which make up the "as found" minimum pathway leakage (MPL), 30611 acem were contributed by two penetrations. Containment purge system valves 1Th8-F319 and 1Th8-F320 at penetration X26 contributed 233h9 acem. Shaft o-ring seals (one set) on 1Tk8-F326 at penetration X220 contributed 7262 acem. These two leakages account for 0.601 vt%/ day.
In the case of the penetration X26 purge valves, repair of both valves reduced MPL to 86 accm. The o-ring seals on 1Th8-F326 were replaced as a pair. A more detailed analysis of the leakage might have resulted in isolating the leakage to one of the o-rings. Replacement of a single o-ring followed by a successful LLRT could have avoided the 7262 acem minimum pathway leakage assessment cr substantially reduced it.
LEAK RATE TEST ACTION PLAN
- 1. Continue present LLRT program with these changes. Revise test procedures and equipment as necessary to determine the leakage rate of individual valves prior to initiating any rernirs or modifications.
Perform an engineering analysis of each LLRT result requiring corrective repair to assure that unnecessary MPL penalties are avoided and still attain leaktightness. Example: In a simultaneous test, the valve having the highest leakage is repaired first. Carrying this principle further, where it can be determined by some means that only one of two o-rings in a simultaneous o-ring test is leaking, replace only that o-ring before retesting.
- 2. Continue analysis of failure history of valves so that valves having high failure and leakage reputations receive careful and early attention.
List of
Enclosures:
[1] Type B & C leakage (2] Summary of Type A Test Results SUM 013:1 4
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Enclosura 1 TYPE B LEAKAGE PENETRATION AS AS NO. TEST DESCRIPTION FOUND LEFT MPL CHANGE X1A EQUIPMENT HATCH 0-RINGS 0 0 0 X1B EQUIPEMNT HATCH 0-RINGS 0 0 0 X2 DW PERSONNEL LOCK 0-RINGS - INNER 0 0 0 X2 DW PERSONNEL LOCK 0-RINGS - OUTER 0 0 0 X2 DW PERSONNEL AIRLOCK INNER SPACE 612 612 0 Xh DW HEAD ACCESS HATCH 20 0 10 X6 CRD HATCH 0-RINGS 0 0 0 XTA INBOARD BELLOWS 0 0 0 XTA OUTBOARD BELIDWS 0 0 0 X7B INBOARD BELLOWS 202 20 182 X7B OUTBOARD BELLOWS 552 0 552 XTC INBOARD BELIDWS 123 123 0 X7C OUTBOARD BELLOWS 0 0 0 X7D INBOARD BELLOWS 0 0 0 l X7D OUTBOARD BELIOWS 0 0 0 X8 INBOARD BELLOWS 20 20 0 X8 OUTBOARD BELLOWS 20 20 0 X9A INNER BELLOWS 0 0 0 X9A OUTER BELLOWS 20 20 0 X9B INNER BELLOWS 0 0 0 X9B OUTER BELIDWS 0 0 0 X10 INBOARD BELLOWS 0 0 0
- X10 OUTBOARD BELIDWS 0 0 0 X11 INBOARD BELLOWS 0 0 0 X11 OUTBOARD BELIDWS 0 0 0 X12 INBOARD BELLOWS 0 0 0 X12 OUTBOARD BELIDWS 21 21 0 X13A INBOARD BELLOWS 0 0 0 X13A OUTBOARD BELIDWS 0 0 0 X13B INBOARD BELLOWS 0 0 0
! X13B OUTBOARD BELLOWS 19 19 0 X1h INBOARD BELLOWS 20 20 0 I X1h OUTBOARD BELLOWS 20 20 0 X16A INBOARD BELLOWS 0 0 0 X16A OUTBOARD BELLOWS 0 0 0 X16B INBOARD BELLOWS 0 0 0 X16B OUTBOARD BELLOWS 0 0 0 X17 INNER BELLOWS 0 0 0
, X17 OUTER BELI4WS 28 28 0 l X25 Th8 - F32h SHAFT 0 0 O X25 0-RING UPPER Th8 - F32h SHAFT 0
i 0-RING LOWER 0 0 0 a
i SUM 013:2
Enclo:ura 1 O PENETRATION AS AS NO. TEST DESCRIPTION FOUND LEW MPL CHANGE I X25 Th8 - F309 SHAM 0-RING UPPER 0 0 0 X25 Th8 - F309 SHA M 0-RING LOWER 0 0 0 X25 T48 - F308 SHAM 0-RINGS ALL [h] O O O-X25 Th8 - F307 0-RINGS ALL [4] O O O X25 Th8 - F103 0-RINGS ALL [h] O O O X25 Th8 - F324
. 0-RINGS ALL [h] O O O X26 Th8 - F319 0-RINGS [4] O EACH 20 EACH (80) 40 X26 Th8 - F320 0-RINGS [h} O EACH 0 0 X35A 0-RINGS 0 0 0 X35B 0-RINGS 0 0 0 X35D 0-RINGS 0 0 0 X35E 0-RINGS 0 0 0 i Xh3 DW TEST 0-RINGS 0 0 0 X100A ELECTRICAL PENETRATION O O O X100B ELECTRICAL PENETRATION 0 O O X1000 ELECTRICAL PENETRATION 0 0 0 X100D ELECTRICAL PENETRATION O O O X101A ELECTRICAL PENETRATION O O O X101B ELECTRICAL PENETRATION O O O X101C ELECTRICAL PENETRATION O O O j X101D ELECTRICAL PENETRATION 0 O O X101E ELECT 3ICAL PENETRATION 0 0 0 X101F ELECTRICAL PENETRATION 0 0 0 J X102A ELECTRICAL PENETRATION O O O X103A ELECTRICAL PENETRATION 0 0 0 X104A ELECTRICAL PENETRATION 0 0 0 X10hB ELECTRICAL PENETRATION O O O X10hc ELECTRICAL PENETRATION 0 0 0 X10hF ELECTRICAL PENETRATION O O O l X10hG ELECTRICAL PENETRATION 0 O O X10hH ELECTRICAL PENETRATION O O O X105A ELECTRICAL PENETRATION O O O X105C ELECTRICAL PENETRATION O O O X106B ELECTRICAL PENETRATION O O O X200A TORUS ACCESS HATCH 0-RINGS 20 0 10 X200B TORUS ACCESS HATCH 0-RINGS 20 0 10 O .
SUM 013:3
PENETRATION AS AS NO. TEST DESCRIPTION FOUND LEFT -MPL CHANGE X200C TORUS ACCESS HATCH 0-RINGS 20 0 10 X201A BELIOWS O-RINGS (2) 0 0 0 X201B BELLOWS 0-RINGS (2) 0 0 0 X201C BELLOWS O-RINGS (2) 0 0 0 X201D BELLOWS 0-RINGS (2) 0 0 0 X201E BELIOWS 0-RINGS (2) 0 0 0 X201F BELLOWS 0-RINGS (2) 0 0 0 X201G BELLOWS 0-RINGS (2) 0 0 0 X201H BELIDWS 0-RINGS (2) 0 0 0 X202 ELECTRICAL PENETRATION 0 O O X205 Th8 - F310 FLANGE 0-RINGS (2) 0 0 0
, X205 Th8 - F310 SHAFT O-RINGS (2) 0 0 0 i X205 Th8 - F311 l FLANGE O-RINGS (2) 0 0 0 l X205 Th8 - F311 i SHAFT 0-RINGS (2) 0 0 0 l X218 Th8 - F318
- SHAFT O-RING 0 0 0 X218B CONSTRUCTION DRAIN 0 0 0 X220 Th8 - F326 0-RINGS (h) 20 80 40 X220 Th8 - F318 0-RINGS (h) 1458h 80 7262 0 AZ RPV HATCH 0 0 0 45 AZ RPV HATCH 0 0 0 90 AZ RPV HATCH 26 26 0 135 AZ RPV HATCH 0 0 0 180 AZ RPV HATCH 0 0 0 225 AZ RPV HATCH 0 0 0 270 AZ RPV HATCH 0 0 0 315 AZ RPV HATCH 0 0 0
- X17 INNER BELLOWS 0 0 0
- X17 OUTER BELLOWS 28 28 0 16387 1209 810T O
SUM 013:h
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Enclo2ure 1 O
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SUMMARY
OF MINIMUM PATHWAY LEAKAGE TYPE B LEAKAGE IMPROVEMENT 8106 ACCM TYPE C LEAKAGE IMPROVEMENT 39078 ACCM MINIMUM PATHWAY LEAKAGE IMPROVEMENT 47184 ACCM CONTAINMENT VOLUME 258,910 FT3 = 5091329.68 CC 1.0% WT/ DAY = 50913.3 ACCM
- Ia = 1.2 X 50913.3 = 61095.96 ACCM = 61096 ACCM WT%/ DAY AS FOUND = h718h -= 0.927 50913 UCL TOTAL TIME 0.611 1.538 WT5/ DAY ,
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..-...,.._.,.,..,_.,---,,-..._,,,,-_,,,,.~.,_.,,-,._,__,,-._,_.,._,_-_,-..-.w..-..-,-,,,,. . _ , , , . - , , , , , _ , , . -
Enclosura 1 TYPE C LEAKAGE SINGLE FAILURE MINIMUM PATHWAY (MPL)
CRITERIA CRITERIA AS AS AS AS PENETRATION FOUND LEFT FOUND LEFT MPL CHANGE 7A** 8527 1h35 426h 717 35h7**
TB** 16015 0 8007 0 8007"*
TC** 1913 957 957 478 hT9'*
TD** 1776 164 888 82 806**
8 3676 20 20 0 20 9A 21* 21* 21 21' O 9B 5831* O - -
9B 73h8* O - -
9B hl* hl* - - -
hl* 11*
9B 52* Sh* 52*
i 10 34 20 17 10 7 11 1211 0 0 0 0
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12 131 1k6 131 136 -6 13A 200 200 115 115 0 13B 1h10 55 1410 55 1355
.i 13B 1765 323 - -
l 14 266h 20 - - -
ik 0 25 0 20 -20 16A h6 h6 21 21 0 16B 21 21 0 0 0 X17 0 20 0 0 0
- ' X18 1513 20 - - -
X18 0 0 0 0 0 X20/hh 5953* 20* 20* 10* 10*
X22 808 0 - -
X22 . 0 0 0 20 -20 X23/2h 0 21* O 21" -21*
, X25 41 h1 41 41 0 X25/205 0 20 0 10 -10 1 X26 >28090 -
23392 43 233h9 "
X26 23392 86 - -
X27A 20 20 0 0 0 X27F 30 30 20 20 0 4 X28A 117 20 20 0 20 31D 0 0 0 0 0 31F 0 0 0 0 0 330 ho ho 0 0 0 3hE 20 20 10 10 0 i 39A 0 0 0 0 0 39B hT 47 h7 47 0 1
> 0FF SCALE AT h2 PSI - EXCLUDED FROM COLUMN TOTAL i
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Enclo2ura 1 AS AS AS AS PENETRATION FOUND LEFT FOUND LEFT MPL CHANGE Xh00 0 0 0 0 0 Xh2 1215 60 60 0 60 Xhh (SEE X20/hk)
Xh5F 0 0 0 0 0 X46 20 20 20 20 0 X52F 20 20 0 0 0 X59A 1009 23 1009 23 986 X203 65* 65* 33 33 0***
X20hA 30hi* 1320* 1520 660 860***
X20hB 20h9* 875* 1025 h38 587'**
X20h0 329' 900 165 h50 -285***
X20hD 120* 20' 60 10 50***
X205 (SEE X25) - - - -
X206A 20 20 20 20 0 X207 0 0 0 0 0 X208A 170* 110' 55* 55' 0 X208B 75712' 0* 0 0 0 X210A 120h2* 254' 6021* 127' 589h***
X210A 3833' 79* 3833' 79 3754***
X210A 2200 81 2200 81 2119'**
X210B 7100 252 3550 126 3424***
X210B 31602 20 31602 20 31582***
X210B h99 303 250 152 98***
X212 105 105 0 0 0 X210B 958h* 20* 20 20 0 0 X210B X210B 20*
96*
20*
96*
20*
h8*
20' h8' 0
0 0
86 X213 h173 86 86 X21h 95703 0 0 0 0 X215 0 0 0 0 0 X217 300 20 20 20 0 X218A 0 0 0 0 0 X218A 20' 20" 0 0 0 X218A 31" 31' O O O X218A 0 0 0 0 0 X220 0 0 0 0 0 X220 70 83 35 h2 -7***
X220 0 0 0 0 0 X220 20 20 0 0 0 X220 20 0 10 0 10***
X221c 20 37 10 19 -9'**
X222A 26 51 13 26 -13*** '
X223A (0) 0 0 0 0 0 X223A (G) 0 1hi 0 1h1 -1h1 X223A (H) 0 0 0 0 0 X223A (H) 0 20 0 20 -20 ,
X223A (I) 0 0 0 0 0 X223A (I) 166 20 166 20 1h6 X223A (J) 0 0 0 0 0 X223A (J) 0 20 0 20 -20 X223A (K) 0 0 0 0 0 O x223^ (x) 19 116 19 116 -97 SUM 013:7 l
Enclo:ura 1 AS AS AS AS PENETRATION FOUND LEFf FOUND LEFT MPL CHANGE X223A (L) 0 0 0 0 0 X223A (L) 20 20 20 20 20 X223B (A) 0 0 0 0 0 X223B (A) 28 20 28 20 8 X223B (B) 0 0 0 0 0 X223B (B) 0 166 0 166 -166 X223B (C) 0 0 0 0 0 X223B (C) 0 0 0 0 0 X223B (D) 0 0 0 0 0 X223B (D) 0 23 0 23 -23 X223B (E) 0 0 0 0 0 i X223B (E) 0 37 0 37 37 l X223B (F) 0 0 0 0 0 X223B (F) 165 20 165 20 1h5 l
l Type C MPL CHANGE 39,078#
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- HYDRAULIC LEAKAGE
- CLOSED SYSTEM OUTSIDE CONTAINMENT
- Includes improvements in air leakage and MSIVs. Does not include hydraulic leakage or closed system outside containment. Does not include negative changes.
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SUM 013:8
Enclosure 2 O Summary of Type A Test Results f
The following is a sunenary of test results for the successful ILRT and verification tests completed on Edwin I. Hatch Unit 1 on April 19, 1986 (values are vt.5/ day):
, Test Results Acceptance Calculation Method Criteria Ma'as Point Total Time Calculated Leakage Rate 0.417 0.hk1 0 900 95% Upper Confidence Limit 0.k28 0.611 0.900 Verification. Test 1 567 -
1.312 to 1 912 1.578 1.336 to 1 936 Values for calculated leakage and 95% UCL include a penalty of 0.004 wt.5/ day for systems not in their post-LOCA alignments.
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