United States Nuclear Regulatory Commission - Protecting People and the Environment

Morning Report for March 1, 2001

                       Headquarters Daily Report

                         MARCH 01, 2001

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                    REPORT             NEGATIVE            NO INPUT
                    ATTACHED           INPUT RECEIVED      RECEIVED

HEADQUARTERS        X
REGION I                               X
REGION II                              X
REGION III                             X
REGION IV                              X
PRIORITY ATTENTION REQUIRED  MORNING REPORT - HEADQUARTERS MARCH  1, 2001

MR Number: H-01-0014

                           NRR DAILY REPORT ITEM
                           GENERIC COMMUNICATIONS



Subject: Issuance of Information Notice 2000-17, Supplement 2

NRC Information Notice 2000-17,Supplement 2: Crack in Weld Area of
Reactor Coolant System Hot Leg Piping at V. C. Summer,
dated February 28, 2001

The U.S. Nuclear Regulatory Commission is issuing this information notice
(IN) supplement to provide updated information about the crack found in a
weld in the A loop hot leg pipe in the reactor coolant system (RCS) at
the V. C. Summer Nuclear Station.

Technical contacts: Eric Benner, NRR       Billy Crowley, Region II
                    301-415- 1171          404-562-4612
                    E-mail: ejb1@nrc.gov   E-mail: brc@nrc.gov

                    C. E. Carpenter, NRR
                    301-415-2169
                    E-mail:cec@nrc.gov

Accession No. ML010570353
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HEADQUARTERS      MORNING REPORT     PAGE  2          MARCH  1, 2001

Licensee/Facility:                     Notification:

Summer Carolina Electric & Gas Co.     MR Number: H-01-0015
Summer Unit 1                          Date: 03/01/01
South Carolina

Subject: Part 21 - Internal Binding of the Terminal Shaft in Woodward EGB
         Hydraulic Actuators


Discussion:

VENDOR: Summer                  PT21 FILE NO: m1-11-0
DATE OF DOCUMENT:   02/28/01    ACCESSION NUMBER:
SOURCE DOCUMENT: EN 37788       REVIEWER: REXB, D. Skeen

The Summer licensee reported internal binding of a terminal shaft on a
Woodward Type EGB hydraulic actuator unit on an emergency diesel
generator (EDG). On 12 /21/00, after a full load surveillance run, the A
EDG experienced load swings and frequency oscillations when the output
breaker was opened. The EGA electronic control unit and EGB hydraulic
actuator were replaced with components from the licensee's warehouse. A
1.5 hour surveillance run yielded satisfactory results. A second 1.5 run
was made to verify satisfactory performance. During the second run,
moderate frequency oscillations were observed when the output breaker was
opened. The licensee installed monitoring instrumentation and performed a
third run. Severe frequency oscillations (from full fuel to no fuel)
occurred on the third run. Even with the EGA control unit disconnected,
the EGB actuator could not be stabilized. The licensee removed the EGB
actuator and sent it to B.F. Goodrich/Fairbanks Morse (the EDG
manufacturer) for evaluation.

Subsequent investigation by B.F. Goodrich/Fairbanks Morse determined that
the binding was caused by clamping screws that were 1/8-inch longer than
those specified by the governor vendor (Woodward). The licensee stated
that the error was made during refurbishment of the EGB unit by Engine
Systems, Incorporated (ESI), on 2/24/00. The licensee replaced the EGB
units on both emergency diesel generators with units refurbished by B.F.
Goodrich/Fairbanks Morse.

The NRC will post ensuing reports on this subject on its Web site at
http://www.nrc.gov/NRC/PUBLIC/PART21/2001.

Contact:    Dave Skeen, NRR
            301-415-1174
            dls@nrc.gov
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