ML17249A335

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Responds to IE Bulletin 79-17, Pipe Cracks in Stagnant Borated Water Sys at PWR Plants. Examination of Stagnant Portions of Sys Not Previously Performed Were Completed on 791010
ML17249A335
Person / Time
Site: Ginna Constellation icon.png
Issue date: 10/24/1979
From: White L
ROCHESTER GAS & ELECTRIC CORP.
To: Grier B
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
IEB-79-17, NUDOCS 7912170247
Download: ML17249A335 (4)


Text

-I ~ e ~ ~U ROCHESTER GAS AIVD ELECTRIC CORPORATIOH o 89 EAST AYE:/IJE, ROCHESTER, ."I.Y. 14649 LEON 0, WHITE JR TSLaUIIOhe VICE I'RCeloCNT i~I:i cooc -.Ie 5 J8-2700 October 24, 1979 Mr. Boyce H. Grier, Director U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Region I 631 Park Avenue King of Prussia, PA 19406

Subject:

IGE Bulletin 79-17 Final Response R.E. Ginna Nuclear Power Plant,, Unit 1 Docket No. 50-244

Dear Mr. Grier:

On August 24, 1979 we forwarded the requested infor-mation of IGE Bulletin 79-17 concerning the stagnant borated water systems at R. E. Ginna Nuclear Power Plant. 'We also stated that stagnant portions of systems that are accessible during normal reactor operation,, where surface and volumetric examinations had not been previously performed, would be examined within sixty (60) days in accordance with the re-quirements of Item 2 of the Bulletin.

These required examinations were completed on October 10, 1979 and included both liquid penetrant and ultrasonic examinations of twenty-four (24) welds. The twenty-four (24) welds consisted of a sampling of over ten (10) percent of the remaining stagnant borated water systems that had not been previously, examined. The following is a listing, by system and size, of the welds examined:

CONTAINMENT SPRAY (6" discharge in Aux. Bldg.)

6- 5 6- Sr SI 2020 2020 13 6-SI 6- SI 2020 - 15 20 2020 6-SI 2020 22 6- SI 2021 4 6- SI 2021 9 6- SI 2021 12 6-SI 6- 2021

- 16 SI 2021 23 912170 Z +.7 gg/I

ROCHESTER CAS ANO ELECTR RP. SHEET NO.

oATE October 24, 1979 Mr. Boyce H. Grier, Director SAFETY INJECTION (3" 6 4" discharge in Aux. Bldg.)

3 - SZ 2022 - 8 3 - SI - 2022 - 13 3 SZ - 2022 - 20 4 - SI 2022 24 3 SI - 2023 8 3 SI - 2023 - 15 3 - 2023 20 4- S1SZ- 2023- 24 3- SI- 2024- 3 3 SZ 2024 - 5 3- SI-- 2024- 22 3 SZ 2024 32 CONTAINMENT SPRAY (10" 8 6" suction in Aux. Bldg.)

10 - SI - 2019 - 2 6 - SI - 2019 - 14 There were not any indications, either surface or volumetric, that the subject welds and adjacent base material had suffered any stress corrosion cracking attack. Therefore, we are considering this correspondence as the final response to ISE Bulletin 79-17.

If you have any further questions, do not hesitate in contacting us.

Very truly yours, L. D. Whi e, Jr.

AEC:dmaK8 xc: Director Division of Operating Reactors U. S. Nuclear Regulatory Commission Office of Inspection and Enforcement Washington, DC 20555