ML20028F287

Final Deficiency Rept DER 82-82 Re Mechanical Snubbers Not Permitting 5 Degree Movement W/O Binding.Initially Reported on 821222.Specific Fabrication/Shipping Period Evaluated, Pipe Clamps Will Be Inspected & Rept from Vendor Requested

ML20028F287
Person / Time
Site:	Palo Verde
Issue date:	01/19/1983
From:	Van Brunt E ARIZONA PUBLIC SERVICE CO. (FORMERLY ARIZONA NUCLEAR
To:	Sternberg D NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION V)
References
10CFR-050.55E, 10CFR-50.55E, ANPP-22778-GHD, DER-82-82, NUDOCS 8301310342
Download: ML20028F287 (7)

Text

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Docket Nos. 50-528/529/530 50.55 (o) RCpor tSC Arizona Public Service Company

,,o. 30, m . motmx. Amzon^ 8""

I?33 JM M /nll IC January 19, 1983 ANPP-22778-CHD/BSK

.r,cc:37;ygg U. S. Nuclear Regulatory Commission Region V Creekside Oaks Office Park 1450 Maria Lane - Suite 210 Walnut C:eek, California 94596-5368 Attention: Mr. D. M. Sternberg, Chief Reactor Projects Branch 1

Subject:

Final Report - 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:

Telephone Conversation between P. Narbut and G. Duckworth on December 22, 1982

Dear Sir:

Attached, is our final written report of the Reportable Deficiency, under 10CFR50.55(e), referenced above.

Very truly yours,

%. ML 6fC E. E. Van Brunt, Jr.

APS Vice President Nuclear Projects ANPP Project Director EEVBJr/CIID:ske Attachment cc: See Attached Page 2

U. S. Nuc2 ear Regulatory Commission Attention: Mr. D. M. Sternberg, Chief ANPP-22778-CliD/BSK January 19, 1083 Page 2 cc: Richard DeYoung. Director Of fice of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D. C. 20555 T. C. Woods, Jr.

J. A. Roedel D. B. Fasnacht C. C. Andognini J. R. Bynum B. S. Kaplan W. E. Ide A. C. Rogers J. Vorces J. A. Brand A. C. Gehr W. J. Stubblefield W. C. Bingham R. L. Patterson R. W. Welcher R. M. Grant D. R. llawkinson L. E. Vorderbrueggen C. A. Fiorelli P. P. Klute Lynne Bernabei Esq.

liarmon & Weiss 1725 "I" Street, NW Washington, D. C. 20006 R. L. Greenfield Assistant Attorney General Bataan Memorial Building Santa Fe, New Mexico 87503 1

FINAL REPORT - DER 82-82 DEFICIENCY EVALUATION 50.55(e)

ARIZONA PUBLIC SERVICE COMPANY (APS) f PVNGS UNITS #1 AND #2 i

1 I. Description of Deficiency i Two (2) Nonconformance Reports (NCR's),No. PC-5091 and No. PA-4948,

! were initiated as a result of an interference condition found during

} installation of Pacific Scientific Shock Suppressors and ITT Crinnell Figure 306/307 Mechanical Snubber Attachment Clamps. Inadequate cicarance between the Shock Suppressor body and ends of the Pipe ,

Clamp did not permit the required lateral movement in either direc-1 tion. This Deficiency Evaluation Report (DER) was initiated to I

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 angu-lation of plus or minus 5' without binding or bending."

l II. Analysis of Safety Implications 8

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 impair-

) ing its safety function.

III. Corrective Action

a. ITT Grinnell has conducted a detailed engineering evaluation l of the Figure 306/307 Mechanical Snubbers, and determined l that interferences are part of a general material problem limited to specific fabrication / shipping periods as stated i in the attached letter dated November 16, 1982.

I

b. The NCR's covering Units #1 and #2 will be dispositioned

" Rework", using ITT Grinnell's recommended corrective action criteria as outlined in the attached letters. The Pipe Clamps on Unit #3 Shock Suppressors will also be inspected and an NCR issued-if any Clamps having this interference condition are found,

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. 82-82 addresses the report-ing requirements specified under 10CFR 21.21(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 trans-mitted to ITT Grinnell requesting their review for reporting under 10CFR Part 21, including number and location of all components.

. 1 RECEIVED ATTACHMENT TO DER 82-41 .

PROCUREMENT CC2 J. D. Franklin W.H. k &s i E C 0 31982 -

R. R. Jepson J. F. O'Imary s [F U T R. w. = =

J. a. scarpino R. E. WEBER i - - - - - -

?. ': R R. E. Weber ITTGrinnellCorporation Esecurire OtWees Owen O'Neill St w e Collins N N N/88l Providence, }>odeIsland02901 PheHangerDivision M01)Bl.7mo November 16, 1982 Bechtel power Corporation  !

• O I I'/ /py g-k, P.O. Box 3965 7' U,/

San Francisco, CA 94139 ) IS;9 Attn Purchasino Department Re: P.O. 06600-M-2119AC

Subject:

ITT Grinnell Figure 306/307 Hechanical Snubber Attachment Clearances Centlemen:

( One of the features of the ITT Grinnell Figure 306/307 sechanical 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,1980, this cone of action sav bT Iess than in products produced since that date. It is our experience that the available included l ' 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 following is a more detailed statement of this potential problem as well as methods f or reworking material to obtain the additional angularity.

There is a chance of insufficient clearance between the Pacific Scientifie Thock Arrestor and the ITT Grinnell manuf actured pipe clamps. Affected could Ee the included angle cone of action to the pipe clamp axis, as defined in the ITT Grinnell Load Capcity Data Sheet for these supports. The potential problem is interference between the ends of the ITT Crinnell pipe clamp and "

the cylinder end plug of the Pacific Scientific Shock Arrestor.

A detailed engineering evaluation of the Figure 306/307 sechanical snubber has been performed for all configurations since product inception in 1977 In addition to the potential Pacific Scientific Shock Arrestor / pipe clamp interference described above, a similar chance c,f interference may occur p between the pivot sount and the rear bracket, both produced by ITT Grinnell.

( 'Agiin, the included angle cone of action to the rear bracket axis say be

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affected. The potential probles here is interference between the ITT Crinnell pivot mount lug (or the Pacific Scientific Shock Arrestor cylinder end plug) l and oversize welds between the lugs of the ITT Crinnell rear bracket.

[

e R

November 16, 1982

( 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 af ter 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:

a. All mechanical snubbers that incorporate welded rear brackets; and

b. Size 3 and 35 pipe clamps.

Both of the conditions identified above can be alleviated by slinht erinding.

( The ends of the clamps may be ground to the ITT Grinnell specified minimum edge distance.- The problems with the rear brackets / rear pivot fit can be resolved by grinding the welds, in the area of interference, to the ITT Grinnell 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 plants. It is thus YntIrely possible that your plant also does not have an actual or potential problem with these mechanical snubbers. _Nevertheless, this is to inform you that to verify that a problem does not exist, an engineerint analysis can be made. It is thus requested that you notify ITT Grinnell of the results of this evaluation. If an item by item inspection check at your facility is required, ITT Grinnell will provide:

1. Trained personnel to actually perform the detailed inspection; or

2. Experienced personnel to train your inspection personnel. .c If these inspection / training services are required, please contact Ben Kelly, Manager - Project Management at our Providence, Rhode Island offices.

N r

e

( November 16, 1982 Page 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 LL ' CORPORA rION J

. ud.

W. HARE-Pro et Manager

/kg CC: P. Milman

( D. McKenney H. Thielsch D. Sewell - Warren B. Kelly P. Stanfsh 9

b k

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AG ATTACHMENT TO DER 82-41

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ITTGrinnellCorporation November 16, 1982 621 Dana Anan, N.E Warren, % 44481 (216) 373 15 %

Bechtel Power Corporation Palo Verde Nuclear Generating Station P. O. Box 49 Palo Verde, Arizona 85343 ATTENTION: Mr. Joe Sabol

Dear Sir:

s In response to your inquiry on the required edge dimensions for our Fig. 306/307 Pipe 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 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 end 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 snubber body, which is the majority of the situations. 2.56 inches is for those snubbers where the hub protrudes.

I hope this information will assist you.

Sincerely, W'

g Robert A. Russell Sr. Product Engineer Pipe Hanger R D & E RAR/h cc: J. Halliday - Warren P. Stanish - Prov.

E. Anderson - Prov.

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