United States Nuclear Regulatory Commission - Protecting People and the Environment

ACCESSION #:  9609190044

Grinnell [Registered Trademark]
CORPORATION                                  ENGINEERED PIPE SUPPORTS

Precision Park
160 Frenchtown Road
North Kingstown, RI 02852

                                   September 16, 1996

United States Nuclear Regulatory Commission
Washington,
DC 20555

ATTENTION: NRC OPERATIONS CENTER

RE:  INTERIM REPORT
     TITLE 10 - CHAPTER 1 - 10CFR PART 21

Gentlemen:

During a recent engineering review of a Duke Power Purchase Order,
Grinnell discovered the following deviation:

Grinnell Hydraulic Shock and Sway Suppressors (Snubbers) have been
qualified to the following environmental conditions:

     Radiation: 3 x 10**7 Rads

     Temperature for Seals and Metal Reservoirs (PH 76N and PH 74R)

          340 degrees F for 3 hours followed by
          320 degrees F for 3 hours followed by
          250 degrees F for 18 hours

     Temperature for Polycarbonate Reservoirs:

          200 degrees F Continuos Operation with Brief Transients to
               250 degrees F

These conditions vary from the accident environmental conditions
contained in Duke Power's specifications for the McGuire and Oconee
Plants.

After obtaining additional information Grinnell promptly notified Duke
Power of the deviation so they could perform a safety evaluation.

SALES/MARKETING           TECHNICAL SERVICES               ADMINISTRATION

Page 2
September 16, 1996
RE:  INTERIM REPORT
     TITLE 10 - CHAPTER 1 - 10CFR PART 21

Duke Power notified Grinnell on September 3, 1996 that the snubbers are
operable as shipped.  This was confirmed by Duke Power Problem
Investigation Reports - Serial # 0-096-1636 for the Oconee site and
Serial # 0-M96-2408 for the McGuire Site.  Duke Power intends to clarify
the post accident environmental temperatures and radiation level
requirements in their design specifications.

Grinnell is currently reviewing the environmental conditions (relative to
hydraulic snubbers of customer design specifications to assure we are in
compliance and we will notify the appropriate customers if any deviations
are found.  We will also keep the NRC informed.

Evaluation Completion: It is estimated that this review will be completed
on or about November 18, 1996,

Grinnell Contacts:

     David V.  Walshe - Quality Assurance Manager (401 - 886-3030)
     Stephen J.  Perreault - Engineering Manager (401 - 886-3040)

                              Very truly yours,

                              Grinnell Corporation

                              David V. Walshe
                              Quality Assurance Manager

DVW/gp

cc:  Part 21 Evaluation Group
     D.  Curtin - G/NK
     B.  Doherty - G/Exeter
     Duke Power

GENERAL INFORMATION or OTHER                  EVENT NUMBER: 31009

LICENSEE: GRINNELL CORP, NORTH KINGSTOWN, RI  NOTIFICATION DATE:
09/16/96
  CITY: NORTH KINGSTOWN       REGION: 1       NOTIFICATION TIME: 12:11
                                                [ET]
 COUNTY:                       STATE: RI      EVENT DATE:        09/16/96
LICENSE#:                  AGREEMENT: Y       EVENT TIME:      00:01[EDT]
 DOCKET:                                      LAST UPDATE DATE: 09/16/96

                                                  NOTIFICATIONS

NRC NOTIFIED BY: DAVE WALSHE                  VERN HODGE         NRR
HQ OPS OFFICER: CHAUNCEY GOULD

EMERGENCY CLASS: NOT APPLICABLE
10 CFR SECTION:
CCCC 21.21               UNSPECIFIED PARAGRAPH

                               EVENT TEXT
- 10CFR21 REPORT -

THE GRINNELL CORPORATION DISCOVERED DEVIATIONS ON A DUKE POWER
PURCHASE
ORDER FOR GRINNELL HYDRAULIC SHOCK AND SWAY SUPPRESSORS
(SNUBBERS).

THESE SNUBBERS HAD BEEN QUALIFIED TO ENVIRONMENTAL CONDITIONS
THAT VARY
FROM THE ACCIDENT ENVIRONMENTAL CONDITIONS CONTAINED IN DUKE
POWER'S
SPECIFICATIONS FOR THE MCGUIRE AND OCONEE PLANTS.  GRINNELL NOTIFIED
DUKE
POWER SO THAT THEY COULD PERFORM A SAFETY EVALUATION.  DUKE POWER
NOTIFIED GRINNELL THAT THE SNUBBERS ARE OPERABLE, AS SHIPPED.  THEY
ARE
CONTINUING FURTHER INVESTIGATION OF THESE SNUBBERS.

*** END OF DOCUMENT ***

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