ML20072T134
| ML20072T134 | |
| Person / Time | |
|---|---|
| Site: | Palo Verde  |
| Issue date: | 03/29/1983 |
| From: | Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR |
| To: | Sternberg D, Sternburg D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V) |
| References | |
| REF-PT21-83 10CFR-050.55E, 10CFR-50.55E, ANPP-23384-BSK, DER-82-82, NUDOCS 8304070457 | |
| Download: ML20072T134 (7) | |
Text
Docket Nos. 50-528/529/530 Clff,
50.55(e) Report 32 001 i Arizona Public Service Company
'['3 PO. BOX 21666. PHOENIX, ARIZONA 85036 nECWh March 29, 1983 ANPP-23384-BSK/GHD U. S. Nuclear Regulatory Connaission Region V Creekside Oaks Office Park 1450 Maria Lane - Suite 210 Walnut Creek, CA 94596-5368 Attention: Mr. D. M. Sternberg, Chief Reactor Projects Branch 1
Subject:
Final Report, Revision 1 - DER 82-82 A 50.55(e) Reportable Condition Relating to ITT-Grinnell Mechanical Snubbers Do Not Permit 5* Movement Without Binding File: 83-019-026; D.4.33.2
Reference:
A) Telephone Conversation between P. Narbut and G. Duckworth on December 22, 1982 B) ANPP-22778 dated January 19, 1983 (Final Report)
Dear Sir:
Attached is Revision 1 to our final written report of the Reportable Deficiency under 10CFR50.55(e), referenced above.
Very truly our O F F.
cm set E. E. Van Brunt, Jr.
APS Vice President, Nuclear Projects ANPP Project Director EEVB/GHD:wp Enclosure cc: See Attached Page Two
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B304070457 830329 PDR*ADOCK 05000528 S
.l U. S. Nuclear Regulatory Commission
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Page Two
'ANPP-23384-BSK/GHD cc: -Richard DeYoung, Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555
'T.
G.. Woods, Jr.
G. C.cAndognini.
J. A. Roedel D. B. Fasnacht
.A. C. Rogers
-B. S. Kaplan
_ W. E. Ide J.'Votees
~J. R. Bynum D. D. Green P. P. Klute A. C. Gehr.
W. J. Stubblefield W. G. Bingham.
R. L. Patterson R. W. Welcher R. M. Grant D. R. Hawkinson-L. E. Vorderbrueggen G. A. Fiorelli
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FINAL REPORT REVISION 1 - DER 82-82 DEFICIENCY EVALUATION 50.55(e)
ARIZONA PUBLIC SERVICE COMPANY (APS)
PVNGS UNITS 1 AND 2 n: <
I. Description of Deficiency
~
Two[(2)'Nonconformance' Reports (NCRs),No.PC-5091andNo.PA-4948,were
' initiated as'a result of an interference condition found during installation of Pacific Scientific Shock Suppressors and ITT.Grinnell' Figure 306/307 Mechanical Snubber Attachment Clamps. Inadequate clearance between the Shock Suppressor body and ends of the Pipe Clamp
~did not permit the required lateral movement in either direction. This
- Deficiency Evaluation Report-(DER) was. initiated to evaluate whether the Mechanical Shock Suppressors supplied by ITT.Grinnell violate the requirement of project Specification 13-PM-209, Revision 11, Paragraph 4.3.5.1.6, "Suppressors shall permit an. angulation of plus or minus 5' without binding or bending."
II.' Analysis-of' Safety' Implications This condition is evaluated as Reportable since, if left uncorrected the piping could be restricted from lateral movement, and resulting reactive
~
forces could cause binding of the Snubber, thereby impairing its safety
' function.
IIII. Corrective' Action
- a.
ITT Grinnell has conducted a' detailed engineering evaluation of the Figure 306/307 Mechanical Snubbers,'and determined that interfer-ences are part of a general material problem limited to specific fabrication / shipping periods as stated in the attached letter dated
~ November.16, 1982.-
b.- 'The Project Prccedures (WP/P-QCI's) for installing ITT Grinnell-mechanical shock-suppressors require the Field Engineer and Quality Control Engineer to examine each. installation for the required j
freedom of movement.~ All of the shock suppressors-installed to date at PVNGS that were affected by the identified deficiencies have been documentedDon Nonconformance Reports. The NCRs will be dispositioned i
to rework;using ITT Grinnell's recommended corrective action. All other mechanical shock suppressors to be installed.in Units 1, 2 & 3 will'be'aubjected to the standard installation procedures for_ nuclear supports. If similar' deficiencies exist, they will be documented on
.NCRs and dispositioned as mentioned above.
c.: In. addition to reportability under 10CFR50.55(e), PVNGS Project considers the Deficiency to be' Reportable by the supplier under the
-requirements of 10CFR Part 21.
This Deficiency Evaluation Report No.
1:
82-82~ addresses the reporting requirements specified under 10CFR21.21(b):(3) with the exception of Sub-Part (vi), which requires the number and location (customers and/or facilities) of other possibly defective equipment. A copy of this Report will be transmitted to ITT Grinnell requesting their review for reporting under 10CFR Part 21, including number and location of all components.
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RECEIVED ATTACHMENT TO DER 82-82 PROCUREMENT 1
CC: J. D. Franklin l
IiC 0 3 1982
- w. m. care.'
R. R. Jepson i
J. F. O'Imary R. E. WEBER
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1T 1 J. R. se.m na R.w.==
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5: ;: R ITTGrinnellCorporation R. E. Haber hecgsy GFggr Owun O'Neill Steve Collins NO WestUChM90970t1 MonVence. Mode Mumf0301
&e HangerOnision
$601)DNlgy November 16, 1982 CO.'J.pn w'/ F.g,.%
Sechtel Power Corporation f
P.O. Box 3965
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7* p'
)ISG San Francisco, CA 94119 Attn Purchasin_e Department Re:
P.O. 46600-M-2119AC
Subject:
ITT Crinnell Figure 306/307 Mechanseal Snubber Attachment Clearances Centlemen:
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One of the features of the ITT Crinnell Figure 306/307 sechanf eal snubbers is to offer an included angle cone _ of action to the pipe clamp axis to accommodate anticipatec piping movements relative to the supporting structure. Recent investigations reveal that, for some products produced prior to April,198_0, this cone of action s_av b7_Tes_s _than in eroduct s produced since that date. It is our experience that the available included
' angle cone of action is not required in the vast majority of applications, particularly, as we have moved from fossil fuel plants, with auch higher temperatures and longer runs of pipe, subject to major pipe movement to nuclear power projects subject to minimal (or negligible) pipe movement. The l
following is a more detailed statement of this potential probles as well as methods for reworking material to obtain the additional angularity.
There is a chance of insufficient clearance _between the Paciff e Scientifie D ock Arrestor and the 177 Crinnell manufactured pipe clamps. Affected could Ee the included angle cone of action to the pipe clamp axis, as defined in the ITT Grinnell Load Capetty Data Sheet for these supports. The potential l
probles is interference between the ends of the ITT Crinnell pipe clamp and the cylinder end plug of the Pacific Scientific Shock Arrestor.
i A detailed engineering evalu3 tion of the Figure 306/307 mechanical snubber has l
been performed for all configurations since product inception in 1977 In addition to the potential Pacific Scientific Shock Arrestor / pipe clasp interference described above, a similar chance of interference may occur between the pivot mount and the rear bracket _, both produced by ITT Crinnell.
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'Agiln, the included angle cone of action to the rear bracket axis may be l
i affected. The potential probles here is interference between the ITT Crinnell l
pivot mount lug (or the Pacific Scientific Shoch Arrestor cylinder end plug) l sad oversize welds between the lugs of the ITT Grinnell rear bracket.
I November 16, 1982
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Page 2 Not all Figure 306/307 mechanical snubbers are affected. Based on our engineering evaluation, we have determined that:
1.
All mechanical snubbers produced and shipped by ITT Grinnell prior to October, 1978 should be reviewed to assure sufficient clearance.
2.
All mechanical snubbers produced and shipped by ITT Grinnell after April,1980 are acceptable, based on design changes incorporated at that time.
3.
Mechanical snubbers produced and shipped by ITT Grinnell between October, 1978 and April, 1980 may exhibit a reduction of the included angle cone of action. Particularly:
All mechanical snubbers that incorporate welded rear brackets; and a.
b.
Size 3 and 35 pipe cleaps.
Both of the conditions identified above can be alleviated by s11the uri_ndina.
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The ends of the cleaps may be ground to the ITT Grinnell specified minimut The problems with the rear brackets / rear pivot fit can be edge distance.-
resolved by grinding the welds, in the area of interference, to the ITT Crinnell specified minimum weld sizes. The only grinding required is that which will avoid interference. Both of these problems can be resolved readily without replacing material.
Problems have not been experienced at the majority of slants. It is thus
' entirely possible that your plant also does not have an actual or potential problem with these mechanical snubbers. JNevertheless, this is to inform you that to verify that a probles does not exist, an engineerina analysis can be l
f this
, jade. It is thus requested that you notify ITT Grinnell of the resu ts o If an ites by ites inspection check at your facility is required,
_ evaluation.
'ITT Grinnell will provide:
1.
Trained personnel to actually perform the detailed inspection; or 2.
Experienced personnel to train your inspection personnel.
If these inspection / training services are required, please contact Ben Kelly, Manager - Project Management at our Providence, Rhode Island offices.
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povember 16, 1982 Fase 3 For further technical information related to this situation, please contact Peter Stanish - Manager - Product Development, at our Providence, Rhode Island offices.
Very truly yours.
CRINNE'L' CORPORA FION
. uD. %
W. EARE Pro et Manager Ik
/kg CC:
P. Milaan
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D. McKenney H. Thielsch D. Sewell - Warren B. Kelly P. Stanish
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2.
ATTACHMENT TO DER 82-82 1
"I 1T T ITTGrinnellCorporation
=-.=-
November 16, 1982 G1 Dun hungN E W m as Quo N 01 GIS)373ISE Bechtel Power Corporation Palo Verde leuclear Generating Station F. O. Box 49 Palo Verde. Arizona 85343 ATTENTION: Mr. Joe Sabol
Dear Sir:
306/307 In response to your inquiry on the required edge dimensions for our Fig.
Fipe Clamps. I submit the following:
Minimum Edge Maximum Edge Size Per NF Dimension 1/4, 1/2
.45"
.63" 1
.60
.81 3
.90 1.19 10 1.20 1.44 f
35 1.80 2.81 (2.56)*
100 3.00 3.44
- Pacific Scientific Company uses an end cap with a threaded hub.
This hub can protrude up to 1/4 inch from the Snubber Body to set the proper and cap height. To minimize rework on the attaching clamps we have provided two edge dimensions. 2.81 inches is appli-cable to those snubbers where the hub is flush or below the anubber 2.56 inches is for body, which is the majority of the situations.
those snubbers where the hub protrudes.
I 1 hope this inforestion will assist you.
Sincerely, N
Robert A. Russell Sr. Product Engineer Pipe Ranger 1 D & E BAR/h F. Stanish - Prov.
cc:
J. Balliday - Warren E. Anderson - Prov.
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