ML19309H575

Forwards Investigation Results in Response to IE Bulletin 80-02.QA/QC Measures Are Sufficient to Insure Continued Integrity During Normal & Accident Conditions

ML19309H575
Person / Time
Site:	Browns Ferry
Issue date:	04/21/1980
From:	Mills L TENNESSEE VALLEY AUTHORITY
To:	James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
References
IEB-80-02, IEB-80-2, NUDOCS 8005130520
Download: ML19309H575 (5)

Text

/ /C 800518057o 60- %7 TENNESSEE VALLEY AUTHORITY c4';O CHATTANOOGA. TENNESSEE 374o1 f

400 Chestnut Street Tower II April 21, 1980

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Mr. James P. O'Reilly, Director

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Office of Inspection and Enforcement U.S. Nuclear Regulatory Con: mission e

Region II - Suite 3100 101 Marietta Street Atlanta, Georgia 30303

Dear Mr. O'Reilly:

OFFICE OF INSPECTION AND ENFORCEMENT BULLETIN 80 RII:JPO 50-259, -260, -296 - BROWNS FERRY NUCLEAR PLANT UNITS 1, 2, AND 3 In response to your January 21, 1980, letter which transmitted OIE Bulletin 80-02, we are enclosing the results of our investigations for our Browns Ferry Nuclear Plant.

If you have any questions concerning this subject, please call Jim Domer at FTS 854-2014.

Very truly yours, TENNESSEE VALLEY AUTHORITY o

. M. Mills, Ma ager Nuclear Regulation and Safety Enclosure 4

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UFFIC OPV An Equal Opportunity F.mployer e

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ENCLOSURE RESPONSE TO NRC-0IE BULLETIN 80-02, DATED JANUARY 21, 1980 l

FROM J. P. O'REILLY TO H. G. PARRIS BROWNS FERRY NUCLEAR PLANT (DOCKET NOS. 50-259, -260, -296)

Item 1.a Have reactor feedwater spargers and thermal sleeves manufactured and/or fabricated by the Marvin Engineering Company been purchased and/or installed in your facility? Since Marvin Engineering is principally a subcontracting company, determine if your equipment originated with the Marvin Company and was eventually supplied to your facility through another contractor / supplier.

Response

Feedwater spargers and thermal sleeve components manufactured and/or fabricated by Marvin Enginecring Company (MEC) have been purchased and have been or are being installed at the Browns Ferry Nuclear Plant. The components were supplied to TVA by the General Electric Company who in turn procured the components from their subcontractor, MEC.

Item 1.b Provide a description of this equipment to include its purchase date and its design function during both normal and accident conditions.

Response

The feedvater sparger allows feedwater to be discharged radially inward i

and downward to mix the cooler feedwater with downcomer flow from the steam separators before the feedwater contacts the vessel wall. The thermal sleeves are. designed to reduce the thermal stresses resulting from temperature differentials caused by low temperature feedwater and high reactor coolant temperatures. The feedwater sparger and thermal sleeve components purchased are presented in Table 1.

The feedwater sparger and thermal sleeve are not safety related and have no design function under accident conditions.

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( Item 2 For each piree of identified equipment, provide the performance history associated. with its usage. This should include the cause of any failures or malfractions and the frequency of such events.

Response

The installation dates and performance history for each piece of equipment identified in Table 1 is provided below:

Browns Ferry unit 1 - PQC numbers LL821 through LL824, LL833, LL837, LL838, LL827, LL843, LL844, LL867, LL871, LL872, LL883, LL900, PP153, PP161, PPl79, Z639, and Z644 are being fabricated at this time and will be installed in the spring of 1981. No performance data is available.

Browns Ferry unit 2 - PQC numbers FF326, DD251, and V644 were installed in the spring of 1978. Since then, a visual examination was performed during the fall of 1979 outage and no indicat oas of malfunctions or failures were found.

Browns Ferry unit 3 - PQC number LL863 has never been, nor are there any plans for it to be installed; therefore, the equip-ment has no performance history. PQC numbers FF120, EE359, FF093, and DD369 were installed in the spring of 1979.

Since then, the unit has been online and no opportunity for visual examination has been presented. However, operations experience has indicated acceptable performance of the identified equipment.

We conclude C at the performance history of the installed final fix spargers at Browns Ferry Nuclear Plant units 2 and 3, which were mainly manufactured at Marvin Engineering Company, have an acceptable performance history to date.

Item 3 P ovide information on the supplier's and receiver's QA/QC program in effect st=the time of purchase. This information should be discEised-in terms of it providing sufficient bases for judging that the integrity of the equipment is sufficient to permit plant operation during normal and accident conditions.

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4. Response TVA -nd GE do not consider the spargers essential to plant safety; therefcre, they were procured as nonsafety-related equipment. CE evaluated and approved Marvin Engineering as a supplier of nonsafety-related equipment.

The sparger design, material procurement, and fabrication were in accordance with the requirements of the General Electric BWR Quality Assurance Program as described in Topical Report NEDO-11209. Quality control surveillance was performed by GE at MEC throughout the fabrication of the spargers.

In addition, TVA field inspection personnel performed inspections during fabrication of the unit 3 equipment, and TVA plans to inspect the unit 1 spargers.

Upon receipt at the plant site TVA performed receiving inspections in.

accordance with the TVA operational quality assurance program. These inspections involved dimensional checks and 100-percent penetrant testing l

of each sparger assembly. Any nonconformances identified during these inspections were corrected before installation of the equipment.

The unit 1 spargers will be likewise inspected.

TVA believes that the QA/QC measures imposed during the design, material procurement, fabrication, receiving, and installation of the spargers afdthermalsleevesareappropriateforthisequipmentandadequatetoensure

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continued integrity during normal and accident conditions.

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TABLE 1 i

FEEIAlAlLR SPAP.GERS AND TilLRMAL SL EEVES

' PQC ti0. & DATE REMARKS UNIT VENDOR GE PO NO.

DATE Brtwns Ferry 1 Marvin Iqgrg.

205-AM050 4/9/79 LL821 - 8/27/79 Sparger Material (Multiple Project (QAMadual#7,Rev0)

(QA Program

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LL822 - 8/27/79 for AM194

-i Order)

(Complies with ANSI N45.2)

NED0-ll209-04A)

LL823 - 8/27/79 I

LL824 - 8/27/79 1

LL833 - 9/7/79 j

LL837*- 9/19/79 i

LL838 - 9/19/79 0

LL827 - 8/27/79 LL843 - 10/2/79 l

LL844 - 10/2/79 LL867 - 10/18/79 LL871 - 11/8/79 l

LL872 - 11/8/79 i-LL883 - 12/11/79 l

LL900 - 12/10/79 I

i PP153 - 11/28/79 PP161 - 11/30/79 PPl79 - 12/20/79

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Browns Ferry 1 Marvin Engrg.

205-AM194 7/11/79 In Progress Feedwater Sparger (QA Manual #7, Rev 0)

(QA Program Assembly NE00-ll209-04A) t Browns. Ferry 1 Marvin Engrg.

.205-G9F49 8/9/77 Z639 - 10/5/77 Thermal Sleeve (QA Manual #7, Rev 0)

(QA Program Z644 - 9/28/77 Assembly NED0-ll209-03A)

Br:wns Ferry 3 Marvin Engrg.

205-XF027 10/3/79 LL863 - 10/12/79 Sparger Bracket Only.

(QA Manual #7, Rev 0)

(QA Program NED0-ll209-04A)

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Br:wns Ferry 2 CBIH/Marvin Engrg.

205-XF071 9/9/77 FF326 - 1/26/79 Feedwater Sparger (QA fimual #7, Rev 0)

(QA Progran D0251 - 4/8/78 Header Assembly f

fled 0-ll209003A)

V644 - 4/7/78

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Br:wns Ferry 3 CBIN/fiarvin Engrg.

205-AJ977 8/22/77 FF120 - 10/11/78 Feedwater SParger (QA Manual #7, Rev 0)

(QA Program EE359 - 9/29/78 Header Assembly NEDO-11209-03A)

FF093 - 9/29/78 0D369 - 8/11/78

• Product Quality Certification (PQC)

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