ML19329B688
| ML19329B688 | |
| Person / Time | |
|---|---|
| Site: | Davis Besse  |
| Issue date: | 11/09/1976 |
| From: | Roe L TOLEDO EDISON CO. |
| To: | Rusche B Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML19329B683 | List: |
| References | |
| 146, NUDOCS 8002060702 | |
| Download: ML19329B688 (7) | |
Text
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TOLEDO
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% EDISON Docket No. 50-346 2.t Y'
LOWELL E. PCE Q - (9 7,Qy"" (%
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Seria1 No. 146
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taisa 2S9-5242 November 9, 1976 N
I Mr. Benard C. Rusche, Director Office of Nuclear Reactor Regulation United States Nuclear Regulatory Commission Washington, D.C.
20555
Dear Mr. Rusche:
The draf t technical specifications for the Davis-Besse Nuclear Power and the NRC Station tait 1 presently under review by the Applicant references 10 CFR 50, Section 50.55 a (g) for all surveillance require-ments covered by Section XI of the ASMI Boiler and Pressure Vessel Code.
As amended February 12, 1976, effective March 15, 1976, 10 CFR 50 Section 50.55 a (g) requires that "... components (including supports) which are classified as ASMI Code Class 1, Class 2, and Class 3 shall forth in Section XI of editions of the ASMI the requirements set meet Boiler and Pressure Vessel Code and Addenda that become effective...,
to the extent practical within the limitations of design, geometry and materials of construction of the components."
10 CFR 50.55 a (g) also states that:
"The initial in-service exam-ination conducted during the first 40 months shall comply with the requirements in the edition of the code and addenda in effect no more than 6 months prior to the date start of f acility commercial operation,"
and "The inicial in-service tests of pumps and valves for assessing operational readiness and system pressure tests conducted during the first 20 months shall co= ply with those requirements in editions of the code and addenda in effect no more than 6 months prior to the start of facility coc=ercial operation." For Davis-Besse Nuclear Power Station 1 the code is effect 6 months prior to the start of facility com-
)
Unit mercial operation is taken to be the 1974 edition of Section XI of the ASME Boiler and Pressure Vessel Code through the S p er 1976 addenda which for purposes of this letter will be ref eren ed simply as the
" Code".
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. "Ift$alicenseehasdetermined 10 CFR 50.53 a (3) also providas that:
that confermance 'dth certain code rertuireraents is impractical for his infor-facility, the licensee shall notify the Cc--4ssion and sub=it Further the Co= mission will nation to support his dyermination."
evaluate,thic information and may grant relief as it deter =ines is approprir e.
The purpose of this letter is to ootline the program which the Applicant is preparing to comply with the requirements of 10 CFR 50.55 a (g) and to request written relief from the Co==ission for performance of any further Section XI requirements during the initial in-service inspection (40 months and 20 months respectively) and testing periods.
The following articles of Section XI represent our ce=pliance with 10 CFR 50.55a (g).
Welds In' piping and their supports per the following:
1) a) Class 1 IS 200 b) Class 2 Subsection IWC f, au I c) Class 3 Subsection IE u
m-1 2)
Pumps Per Subsection IWF Classes 2 & 3 Valves Per Subsection IW Classes 1, 2 & 3 3) 1 project coe=itted to pre-service and in-The Davis-Besse Unit service inspect in accordance with the 1971 edition of Section XI la.
of the ASE Boiler and Pressure Vessel Code through the Winter 1971 The Class 1 pre-service examination has been perfor=ed in Addenda.
accordance with the 1971 edition of Section XI through the Winter The in-service inspection on Class 1 syste=s for the 1971 Addenda.
life of the plant will be perfor=ed in accordance with the 1971 N 0.
editon of Section XI through Winter 1971 Addenda.
Class 2 velds in essential systems 2h" nominal size and larger will (1974 ib.
be inspected in accordance with Subsection IWC of the Code.
The velds that will be edition through Su=cer 1976 Addenda).
inspected are in the areas where pipe breaks were postulated due to high stress concentrations as outlined in NRC 3 ranch Technical Position E3 3-1 and U.S. NRC Regulatory Guide 1.46, and Section XI Other areas where pipe breaks were not postulated Article, IWC 1220.
will not be volumetrically inspected.
All Class 2 penetration welds 2 " co=inal sire and larger will be The inspected in accordance with Subsection IWC of the Code.
inspection schedule for essential and penetration welds will be in accordance with IVC-2412 Inspection Program B in the Su==er 1976 Exceptions which must Addenda, during the first 40 month interval.
be taken on Class 2 systems are the following:
V QP A
SchedEle 19 penetration piping on 12 peectrations cannot be dressed for Volumetric examination without violating minimum 1.
wall thickness recuirements since the material thickness is These velda vill.e surface examined.
b under 1/2".
Intecess1Fic welds which require plant modification for either 1
volumetrie or surface exanination will not be inspected.
2.
Welds in moderate energy systems will not be inspected.
3.
Class 3 components will be hydrotested or visually examined on Systems 2h" and larger per the code requirements of Ic.
d materials of constructLon of the component. defines the operability test program that will be performed on all Class 2 and 3 pu=ps which are provided with an 2.
This progran complies with the requirements' of the C following exceptions.
Fumps in System 2" nominal si:e or smaller will not be tested.
(1)
Dd c.
Pumps will be tested every 92 days instead of 31 days.
(2) identifies the Class 1, 2 & 3 valves to be tested in The Davis-Besse Unit 1 3.
accordance with Subsection IWV of the Code.
procedures are being revised to the extent practical to incorporate Because of =ajor impact on the code operability test progra=.
operating procedures to incorporate the operability requiranent on all valves, the procedures will include, to the extent practical,the valves lis to either partially test or fully test The procedures will be further revised to reflect the balance 31, 1977.
of the valves requiring testing by the Code by Dece=ber 2.
This valve testing program will meet the Code require =ents with the following exceptions.
Class 1 valves 1" nominal size and under will not be inspected.
(1)
Class 2 & 3 valves 2" nominal size and under will not be (2) inspected.
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Four valves which were found to be inaccessible and would require plant modification for testing vill not be inspected.
(3)
Where operation restrictions disallow completed testing of valves during the different modes of operation, the valves (4) will be partially tested to the extent practical.
Yours very truly, W
hg v - Pump In-service Inspection Summary - Valve Test Program wr pc 29/5-Sc e
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DAVIS-BESSE ENCLOSURE 2 Category A Containment Leak Rate Valves 2 " ar.1 larger for Class 2 Valves and I" and larger for Class 1 Valves, whieb will be tested to the 1) extent practical.
CC 1407A CV 5007 CV 5077 CV 5089 MU 2A CC 1407B CV 5008 CV 5078 CV 5090 MU 3 CC 1411A CV 5037 CV 5079 DH 11 MU 33 CC 1411B CV 5038 CV 5080 DH 23 RC 229A CC 1567A CV 5065 CV 5081 DH 87 RC 229B CC 15673 CV 5070 CV 5082 DH 88 RC 1719A CS 1530 CV 5071 CV 5083 DH 1517 RC 1719B CS 1531 CV 5072 CV 5084 DH 1518 RC 1773A CV 209 CV 5073 CV 5085 DR 2012A RC 17733 CV 210 CV 5074 CV 5086 DR 2012B CV 5005 CV 5075 CV 5087 DW 6813A CV 5006 CV 5076 CV 5088 DW 6813B The following are other Valves, Category A, B, C, D, and E, which will 2) be tested to the extent practical.
Pressurizer Code Relief Valves RC 13A, RC 133 a.
Reactor Vent Valves #1, #2, #3, and #4 Core Flood Valves CFIA, CFlB, CF28, CF29, CF30, CF31 b.
c.
d.
ECCS Subsystems Valves DH 14A DH 9B DH 55 HP 56 DH 14B HP 2A DH 64 DH 63 DH 830 HP 2B DH 65 DH 64 DH 831 HP 2C DH 66 DH 84 DH 1A DH 7A DH 67 DH 69 DH 1B DH 7B CS 19 DH 127 DH 12 DH 2733 CS 20 HP 2D DH 13A DH 2734 HP 48 DH 13B DH 54 HP 49 DH 9 A Containment Spray Valves CS 19, CS 20 e.
f.
Auxiliary Feedwater Valves AF 21 MS 730 AF 3871 AF 22 W 786 AF 3872 MS 106 W 790 MSICS 38A MS 106A AF 360 MSICS 383 MS 107 AF 388 MS 107A AF 3869 MS 729 AF 3870
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o Page 2 DAVIS-BESSE
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ENCLOSURE 2 Main Steam Valves MS 100, MS 101 g.
Component Cooling Water Valves h.
CC 1338 CC 123 CC 1471 CC 124 CC 1467 CC 1328 CC 1474 CC 1495 CC 1469 Service Water Valves 1.
SW 2929 SW 1399 SW 1356 SW 2930 SW $421 SW 1357 SW 2931 SW 5422 SW 1367 SW 1358 SW 1382 SW 1424 SW 1366 SW 1383 SW 1429 SW 1368 SW 5 SW 1434 SW 6 SW 1395 cp a/1-2 M
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