ML20094B800

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Potential Part 21 Rept Re Defective Threaded Rod Matl Supplied by Texas Bolt Co on 840618.Rods Returned to Vendor for Replacement.Nonconformance Repts84-187 & 84-205 Encl
ML20094B800
Person / Time
Site: Fort Saint Vrain 
Issue date: 07/30/1984
From: Lee O
PUBLIC SERVICE CO. OF COLORADO
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
References
REF-PT21-84-383-000 84-187, 84-205, P-84244, PT21-84-383, PT21-84-383-000, NUDOCS 8408070233
Download: ML20094B800 (19)
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PUBLIC SERVICE COMPANY OF COLORADO DENVER. COLORADO 80208 P.

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BOX 840 OSCAR R. LEE Y

Fort St.' Vrain v cc. c.mc.n Unit No. 1 P-84244 Director Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission Washington, D.C.

20555

SUBJECT:

Defective Threaded Rod Material - 10CFR21 Report

Dear Sir:

On June 18, 1984, Public Service Company of Colorado received material under PSC Purchase Order N-4501 for use in reinforcement of safety related masonry block walls at its Fort St. Vrain Nuclear Generating Station. The material in question was 5/8" diameter, all threaded rod, purchased under specification ASTM A193, B16.

A visual examination (Attachment 1) of the material during receiving identified fifteen (15) of a total of sixty (60) rods as having longitudinal cracks on the surface which were deeper than the thread roots.

Public Service Company's Quality Assurance Division preliminarily attributed these defects to forging laps in the original stock material.

The Purchase Order required the supplier, Texas Bolt Company of Houston, Texas, to perform a visual examination of the thread area of final machined parts to identify discontinuities such as laps, seams, or cracks which are not acceptable per the referenced ASTM specification.

A Non-Conformance Report (NCR)84-187 (Attachment 2) was written against the entire shipment of rods. The NCR disposition required that all defective material be returned to the vendor. The remaining forty-five (45) rods were to be examined by magnetic particle testing. One (1) additional rod was rejectable by this testing, h

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Texas. Bolt Company was contacted by telephone on June 18, 1984, and notified of the non-conformance. The above sixteen (16) rods were
returned and'replac'ed by Texas Bolt Company on Purchase Order N-4501, Supplement B.

For this-shipment, in addition to the visual examination,-Public. Service Company required that the rods be magnetic. particle tested by Texas Bolt Company prior to shipment.

A magnetic particle test report was provided by Texas Bolt indicating that no defects were identified (Attachment 3).

However, five (5)
rods of'this shipment also contained defects similar to the original

-order. The defective rods on Supplement B were dispositioned via NCR 84-205 and the entire shipment was rejected.

'All of the threaded rods in both shipments were from the same-heat lot, #8087367.

Fort St. Vrain has suspended procurement of quality related materials idirectly.from Texas Bolt Company. All past Purchase Orders have been

reviewed to determine if any other' material from heat #8087367 had been previously received. No other material' from this heat has been received or placed into stock.

The -material was ordered for the specific purpose of a design modification to reinforce safety related masonry block walls at Fort-

St.. Vrain.

However, 5/8" diameter threaded rod purchased under specification ASTM A193, B16, is a standard component which could

. conceivably be used in a number of safety related applications (such if as flange bolting).

Although we have determined no material from heat #8087367 has

-previously been received or used at Fort St.

Vrain our 10CFR21 Evaluation Committee has determined that the subject would be of

-interest to the industry. Their evaluation, as well as the 10CFR21 Report, is enclosed as Attachment-4.

If you have; further questions in this regard, please contact Mr. J.~ W. Gahm or Mr. C. H. Fuller at (303) 785-2223.

Very tr ly yours, i

0. R. Lee ORL/alk cc: John T. Collins M

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10CFR21 COMMITTEE EVALUATION 10CFR21 REPORT J

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PUBLIC SERVICE COMPANY OF COLORADO FORT ST..VRAIN NUCLEAR GENERATING STATION NO. P 21 -0020 PART 21 REPORT EVALUATION PAGE1OF 2

A DESCRIBE DEFECT OR F AILURE-TO-COL 1 PLY Linear surface indications were visually Gbserved in fifteen (15) of sixty (60) all threaded rods which were to be osed for reinforcement of safety related masonry block walls. Material was ordered under Public Service Comoany Purchase Order N-4501, which reauired visual examination by the vendor i

under Soecification ASTM Al93. B16. Subseauent replacement of defective material was also defective.

B PREll'41 NARY EVA' UATION ANSWER E ACH OF THE FOLLOWING YES NO I

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O SAFETY R ELATED PLANT STR bCTURE, SYSTEM, COMPONENT, PART7 2

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T PLANT FE ATURES ADDRESSED IN THE TECHNICAL SPECIFICATIONS?

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O SUBJECT OF AN APPLICABLE NRC REGULATION 7 i.

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m SITUATION IS NOT REPORTABLE UNDER THE CRITERI A OF TECH SPEC AC 7.2c,7.5.2a, OR 7.5.2b.

NOTE:

AT LEAST ONE "YES" BOX MUST BE CHECKED ABOVE FOR THE DEFECT OR FAILURE.TC COMPLY TO HAVE THE POTEN-TIAL FOR CREATING A OUBSTANTIAL SAFETY H AZARD.

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C DETERMINE IF A SUBSTANTIAL SAFETY HAZARD EXISTS 1

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Q A SITUATION WHICH COULD RESULT IN FAILURE OF A SAFETY RELATED COMPONENT OR DEVICE TO OPERATE.

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g A SITUATION THAT COULD RESULT IN A t ALLURE OF THE PHYSICAL SECURily SYSTEM TO MEET THE APPROVED SE-l CURITY PL AN.

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g THE DEFECT OR FAILURE-TO-COMPLY MEETS NONE OF THE ABOVE CRITERIA.

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PUBLIC SERVICE COMPANY OF COLORADO FORT ST. VRAIN NUCLEAR GENERATING STATION NO. P 21 -0020 PART 21 REPORT EVALUATION PAGE 2 OF 2

E EVALU Ail 0N NOTES AND COMMENTS

1) Standard type material which could have been used in a number of applications, such as safety related piping flanges. Although this material was identified as being defective prior to its use, and appears to be limited to heat
  1. 8087367, others should be made aware of the problem.

2)

Implementation of Texas Bolt inspection appears deficient.

3) Bolting not specifically addressed in Final Safety Analysis Report, but potenti a'l uses of this material are.

F EVALU ATION TE AM AND OTHER PARTICIPANTS 1 Fuller 2

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G CONCLUSION THE EVALUATION TEAM HAS CONCLUDED 3 UNANIMOUSLY OBY MAJORITY VOTE THAT THE DEFECT OR FAILURE TO-COMPLY DESCRIBED ON THE ATTACHED PART 21 REPORT CDOES CDOES NOT CREATE A SUBSTANTI AL SAFETY HAZ-ARD.

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PAR: 21 REPORT TO THE NRC NO. 50-267/ 84-01 O REPORT NOT REQUIRED 0...Y EVALUATION TEAM LEADER

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I REMARKS OlSTRIBUTION VICE PRESIDENT, ELECTRIC PRODUCTION VICE PRESIDENT, ENGINEERING AND PLANNING NUCLEAR SITE ENGINEERING P1ANAGER QUALITY ASSURANCE MANAGER SUPERINTENDENT, OA SERVICES (ORIGINAL)

M ANAGER, NUCLEAR ENGINEERING TECHNICAL / ADMINISTRATIVE SERVICES MANAGER MANAGER, NUCLEAR PRODUCTION RECCRDS STORAGE BUILDING MANAGER OF PURCHASING AND STORES PART 21 REPORT INITIATC9 FORM ( A) 372 - 02 3395

PUBLIC SERVICE COMPANY OF COLORADO FORT ST. VRAIN NUCLEAR GENERATING STATION PART 21 REPORT TO THE NRC PAGE F

1 F %CILITY: FORT ST. VRAIN NUCLEAR GENERATING STATION.

2 BASIC COMPONENT OR ACTIVITY THAT FAILS-TO-COMPLY OR CONTAINS A DEFECT:

5/8" Diameter x 10' length, all threaded rod, heat #8087367.

Supplied by: Texas Bolt Company P. O. Box 1211 Houston, Texas 77251 Purchased under:

Purchase Order N-4501 and Purchase Order N-4501, Supplement B.

Specification ASTM A193, B16.

3 IDENTIFICATION OF FIRM CONSTRUCTING THE FACILITY OR SUPPLYING THE BASIC COMPONENT OR ACTIVITY THAT FAILS-TO COMPLY OR CONTAINS A DEFECT:

Supplier - Texas Bolt Company, P. O. Box 1211, Houston, Texas 77251 4 NA'TURE OF THE DEFECT OR FAILURE TO-COMPLY AND THE SAFETY HAZARD WHICH IS CREATED OR COULD BE CREATED BY SUCH DEFECT OR FAILURE-TO-COMPLY:

Under Purchase Order N-4501: Fifteen (15) of sixty (60) threaded rods had longitudinal cracks (laps) detected under visual receipt inspection. Of the remaining forty-five (45) rods which were magnetic particle tested, one (1) addi* 'onal rod was rejected.

Under Pur :hase Order N-4501, Supplement B: Five (5) of sixteen (16) threaded rods for the replacement shipment had longitudinal cracks (laps) detected under visual receipt inspection.

FORM 372-02-3396

PUBLIC SERVICE COMPANY OF COLORADO FORT ST. VRAIN NUCLEAR GENERATING STATION NO. 50 - 267/ 84-01 PART 21 REPORT TO THE NRC

~3 PAGE 2 OF 5

DATE ON WHICH THE INFORMATION OF DEFECT OR FAILURE. TO-COMPLY WAS OCTAINED:

July 30,1984 6

IN THE CASE OF A BASIC COMPONENT WHICH CONTAINS A DEFECT OR FAILURE - TO - COMPLY, THE NUMBER AND LOCATION OF ALL SUCH OOMPONENTS IN USE AT THE FACILITY:

None. Defective material was identified during receiving inspection and prior to use. No other material of this heat number is in use at Fort St. Vrain.

7

' CORRECTIVE ACTION THAT HAS BEEN, OR WILL BE TAKEN; THE NAME OF THE INDIVIDUAL OR ORGANIZATION RESPONSIBLE FOR THE ACTION AND THE LENGTH OF TIME THAT HAS BEEN OR WILL BE TAKEN TO COMPLETE THE ACTION:

a.

For Purchase Order N-4501, the fifteen (15) rods identified by visual examina-tion to be defective were rejected. All remaining rods were magnetic particle tested and one (1) additional rod was rejected under this test. These sixteen (16) rods were returned to vendor for replacement.

b.

For Purchase Order H-4501, Supplement B, sixteen (16) replacement rods were received. Of these, five (5) were rejectable by visual examination. All sixteen (16) rods were rejected and sent back to the vendor. No replacements were requested or received.

(continued on Page 3) i 8

AOVICE RELATED TO THE DEFECT OR FAILURE TO COMPLY ABOUT THE FACILITY, ACTIVITY, OR BASIC COMPONENT THAT HAS BEEN, IS BEING, OR WILL BE GIVEN TO PURCHASERS OR LICENSEES.

Texas Bolt Company was to perform a visual examination of the material prior to the first shipment. A magnetic particle test was also requested for the replace-ment shipment. These tests / inspections were not perfonned in sufficient depth by Texas Bolt Company to identify the defects.

9 NOTIFICATION TO THE NRC BY:

O.R. LEE VICE PRESIDENT, ELECTRIC PRODUCTION PUBLIC SERVICE COMPANY OF COLORADO P. O. BOX 84o D ENVER, CO' R ADO 80201

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{ SIGN ATURE)

(D ATE)

FORM ( A) 372 - 02 3397

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No. 50-267/84-01 Page 3 of 3 7.

(continued)

- c.

Procurement of all quality related !aaterials directly from Texas Bolt, Company has been.. suspended.

d.

All previous Purchase Orders were reviewed to determine if any other material from heat #8087367 has Deen re-ceived. No other material from this haat has been re-ceived or is in use.

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