ML19310A201

Part 21 Rept Re Design Nomographs Used in Sizing & Selection of Itt General Control Hydramotor Electtrohyraulic Actuator. Nomographs May Be Incorrectly Interpreted Resulting in Incorrect Sizing & Selection of Actuators

ML19310A201
Person / Time
Site:	Grand Gulf
Issue date:	04/25/1980
From:	Dale L MISSISSIPPI POWER & LIGHT CO.
To:
References
REF-PT21-80-195-005 AECM-80-87, NUDOCS 8006060267
Download: ML19310A201 (2)

Text

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ATTACHED IS A PART 21 REPORT FROM IE fMIL U?ilT - POOM 359E/W w ,1# ...l 4 ' /f%

PART21IDENTIFICATIONNO, EH9T-oo r COMPANY f1AFE M 4 4 DATEOFLETTER Y/ar/G DOCKET NO, n-W6,a-<roth DATE DISTRIBUTED

@t/ Fd ORIGINAL REPORT] SUPPLDENTARY 2 DISTRIBLTTION:

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FUEL CYCLE & SAFEGUARDS (S)

REACTOR (R)( _ _

f%TERIALS(M)

NRR/ DOR, DIRECTOR (2) AD/FFMSI- AD/SG-IE NRR/DPM DIRECTOR (2)

MSS /FCMS AD/ROI AD/ROI(2) REGIONS REGIONS AD/RCI IE FILES NRR/DDR, DIRECTOR REGIONS PDR NPdS/SG SS-881 IEFILES LPDR PDR CENTPAL FILES CBiTPAL FILES-SS-396 LPDR CBffPAL FILES (CHRON) CBfTFAL FILES (CHRON) TERA PDR IE FILES (2)

LPDR CB4TPAL FIES 016 e L0EBMPA FIB 5715 CENTPAL FILES (CHR000 AEOD - fISB-7602 CENTPAL FILES - SS-396

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PRELIMINARY EVUALATION OF THE ATTACHED REPORT INDICATES LEAD RESPONSIBILITY FOR FOLLOW-UP AS SH0hN BELOW:

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1 MISSISSIPPI POWER & LIGHT COMPANY Helping Build Mississippi

=- P. O. B O X 16 4 0, J A C K S O N, MISSISSIPPI 39205 PRODUCTsON DEPARTMENT April 25, 1980 g , j9g -

Office of Inspection & Enforcement U. S. Nuclear Regulatory Commission Region II 101 Marietta Stree., L.W., Suite 3100

. Atlanta, Georgia 'J303 Attention: Mr. J. P. O'Reilly, Director

SUBJECT:

Grand Gulf Nuclear Station Units 1 and 2 Docket Nos. 50-416/417 File 0272/15525/15526 PRD-SO/12, Status Report, Design Nomographs Related to ITT General Controls Hydramote-Electrohydraulic Actuators AECM-80/87 On March 28, 1950, Mississippi Power 6 Light Company notified Mr. M. J.

Gouge of your office of a Potentially Reportable Deficiency (PRD) at the

, Grand Gulf Nuclear Station (GGNS) construction site. The deficiency con-cerns design nomographs used in the sizing and selection of hydramotor electrohydraulic actuators. The nomographs and actuators are supplied by ITT General Contrals. This matter was previously reported to the NRC by the supplier uuoer 10 CFR 21. The concern is that the nomographs may be interpreted incorrectly and may result in the incorrect sizing and selection of actuators. The nomographs in question pertain to Model NH90 series and AH90 series electrohydraulic actuators.

In the above referenced initial notification of March 28, 1980, the vendor was incorrectly identified as ITT Grinnell General Controls. The correct vendor name is ITT General Controls.

Our preliminary investigation revealed that four (4) actuators (Model NH91) have been procured for use in the Standby Gas Treatment System at GGNS.

Member Middle South Utilities System 8

l. MISSISSIPPI POWER & LIGHT COMPANY v-Mr. J. P. O'Reilly AECM-80/87

! Page Two.

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i Our analysis of this metter is continuing. We e.cpect to provide a

final report by July 21, 1980.

1 Yours truly, d

- L. F. Dale j Nuclear Project Manager

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j JGC/JDR:lj j ec: Mr. N. L. Stampley bec: Dr. D. C. Gibbs Mr. R. B. McGehee Mr. A. Zaccaria '

Mr. T. B. Conner Mr. J. N. Ward Mr. D. M. Lake ,

i udir. Victor Stello, Jr. , Director Mr. W. L. Nail Division of Inspection and Enforcement Mr. .J. P. McGaughy, Jr.

J U. S. Nuclear Regulatory Commission Mr. T. E. Reaves t Washington, D. C. 20555 Mr. J. W. Yelverton Mr. C. K. McCoy Mr. A. R. Smith File i

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