ML20077G327: Difference between revisions
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| number = ML20077G327 | | number = ML20077G327 | ||
| issue date = 07/21/1983 | | issue date = 07/21/1983 | ||
| title = Responds to NRC | | title = Responds to NRC Re Violations Noted in IE Insp Rept 50-483/83-02.Test Conditions for Monitoring Metal Temp Did Not Impair Integrity of Accumulator Tanks Based on Analysis Calculations | ||
| author name = Schnell D | | author name = Schnell D | ||
| author affiliation = UNION ELECTRIC CO. | | author affiliation = UNION ELECTRIC CO. | ||
| Line 11: | Line 11: | ||
| contact person = | | contact person = | ||
| document report number = ULNRC-649, NUDOCS 8308040062 | | document report number = ULNRC-649, NUDOCS 8308040062 | ||
| title reference date = 06-01-1983 | |||
| package number = ML20077G323 | | package number = ML20077G323 | ||
| document type = CORRESPONDENCE-LETTERS, INCOMING CORRESPONDENCE, UTILITY TO NRC | | document type = CORRESPONDENCE-LETTERS, INCOMING CORRESPONDENCE, UTILITY TO NRC | ||
Revision as of 08:04, 27 September 2022
| ML20077G327 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 07/21/1983 |
| From: | Schnell D UNION ELECTRIC CO. |
| To: | Spessard R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| Shared Package | |
| ML20077G323 | List: |
| References | |
| ULNRC-649, NUDOCS 8308040062 | |
| Download: ML20077G327 (1) | |
Text
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UNION ELECTRIC COM PANY 1901 GRATIOT STREET sT. Louis. MISSOURI MAILING ADDRESSa DONALD F. SCHNELL P. O. BOX 149 v.c. -...o=~' July 21, 1983 Mr. R. L. Spessard, Director Division of Engineering US Nuclear Regulatory Commission Region III 799 Roosevelt Road Glen Ellyn, IL 60137 ULNRC-649
Dear Mr. Spessard:
INSPECTION REPORT NO. 50-483/83-02 This reply is in response to your letter of June 1, 1983, which requested information on whether or not the pressure / temperature limit on the accumulators had been exceeded and, if so, any effect on the integrity of the accumulators.
From a review of NDE records for other ongoing tests in the contain-ment building (which required temperature measurement on the dates of known accumulator tank pressurizations) it was determined that the minimum temperature of 70*F as given in the Precautions, Limita-
~
tions, and Setpoints established by Westinghouse was not maintained.
This review indicated that the lowest ambient temperature in the containment building during the period of pressurization was 60*F, and the maximum pressure in the accumulator tanks was 662 psig.
-A worst-case analysis of the accumulators being pressurized without monitoring metal temperature was performed by Westinghouse. The assumptions were: Fill with 32*F water, metal temperature of 60*F (prior to filling) and pressurize to 875 psig. Based on these assumptions, a metal temperature-of 40*F after filling was calculated.
Included in the analysis considerations were: ASME Code design, ASME material requirements, metal fatigue, and fracture mechanics.
Based on the stated assumptions, calculated metal temperature, and the stated' considerations, Westinghouse concluded that these test conditions did not impair the intetrity of the accumulator tanks.
If you have any questions regarding this response or if additional information is required, please let me know.
Very truly yours, M
Donald F. Schnell SKM/jds cc: Mr. H. M. Wescott, NRC Region III NRC Resident Inspector, Callaway Plant Missouri-Public Service Commission 8300040062 830727 PDR ADOCK 05000483 G PDR _, }[ g.%