ML19326B842

Requests Const Completion Date Extension from 740101 to 740501,due to Late Valve Delivery,Eccs Mod & Reactor Coolant Pump Motor Repair

ML19326B842
Person / Time
Site:	Arkansas Nuclear
Issue date:	10/24/1973
From:	Phillips J ARKANSAS POWER & LIGHT CO.
To:	Anthony Giambusso US ATOMIC ENERGY COMMISSION (AEC)
References
7875, NUDOCS 8004180583
Download: ML19326B842 (3)

Text

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' g AEC P34TRIBUTION FOR PART 50 DOCKET M ? RIAL W

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C03 TROL NO:

FILE:

FROM:

DATE OF DOC DATE REC'D LTR MEMO RPT OTHER Arkansas Power & Light Company Little Rock, Ark. 72203 Mr. J.D. Phillips 10-24-73 10-29-73 X

TO:

ORIG CC OTHER SENT AEC PDR XXX A. Giambusso 6 signed CLASS UNCLASS PROP INFO INPUT NO CIS REC'D DOCKET NO:

XXX XXXX 6

50-313 E CRIPTION:

ENCLOSURES:

L.r requesting an extension of completion date for Arkansas Nuclear One unit #1 from 1-1-74 to 5-1-74.......

--~~~..---a PLANT NAME:

Arkansas Nuclear One Unit #1 FOR ACTION /INFORMATION 10-29-73 JB BUTLER (L)

1. SCPRENCER(L)

ZIDIANN(L)

REGAN(E)

W/ Copies W/FCopies W/ Copies W/ Copies CLARK (L)

STOLZ(L)

DICKER (E)

W/ Copies W/ Copies W/ Copies W/ Copies COLLER(L)

VASSALLO(L)

KNIGHION(E)

W/ Copies W/ Copies W/ Copies W/ Copies KNIEL(L)

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W/ Copies W/ Copies W/ Copies W/ Copies INTERNAL DISTRIBUTION Q REG FILE 3 TECH REVIEW DENTON A/T IND

/ AEC PDR HENDRIE GRIMES LIC ASST BRAIDIAN OGC, ROOM P-506A SCHROEDER GAMMILL DIGGS (L)

SALTZMAN HUNTZING/ STAFF MACCARY KASTNER GEARIN (L)

B. HURT CASE KNIGHT BALLARD

/GOULBOURNE (L)

PMNS CIAMBUSSO PAWLICKI SPANGLER LEE (L)

MCDONALD BOYD SHAO MAIGRET (L)

VDUBE MOORE (L)(BWR)

STELLO ENVIRO SERVICE (L)

/ DEYOUNG(L)(PWR)

HOUSTON HULLER SHEPPARD (E)

INFO SKOVHOLT (L)

NOVAK DICKER SMITH (L)

C. MILES P. COLLINS ROSS KNIGHTON TEETS (L)

IPPOLITO YOUNGBLOOD WADE (E)

/ REG OPR TEDESCO REGAN WILLIAMS (E)

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H ELPIN G BUILO ARKANSAS ARK ANS AS POWER & LIGHT COMPANY STM & LOUISlAN A STREETS. LITTLE AOCK. A AK ANSAS 72200.(5013372-4311 October 24, 1973 3

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Subject:

Arkansas Power 4 Light Company L'\\

Arkansas Nuclear One-Unit 1 Docket No. 50-313 O*

Provisional Construction Permit I N No. CPPR-57, Application for Renewal of Construction Permit

Dear Mr. Giambusso:

Arkansas Power 6 Light Company hereby applies for an extension of time for completion of Arkansas Nuclear One-Unit 1, as covered by Provisional Construction Permit No. CPPR-57.

The original Provisional Construction Permit had July 1,1972, as the latest date of completion of the facility.

In June 1972, Arkansas Power 6 Light Company submitted a request for an extension of time for com-i pletion of Unit 1 until July 1, 1973, and on June 14, 1972, the Commis-sion grented this request.

On March 14, 1973, another request was sub-mitted for an extension of time for completion of Unit 1 until January 1, 1974, and on June 4,1973, the Commission granted this request.

Unit 1 has been further delayed due to the following factors:

1.

Late Delivery of Valves - The completion of a number of critical systems has been delayed because cf late delivery of valves. The absence of these valves prevents the construction turnover of the systems and subsequent preoperational testing. This was reported as a major delay factor in our March 14, 1973, request, and continues to be a significant delay factor.

l T AX P AYING. INVESTO A OWNED MEMBE A MlOOLE SOUTH UTILITIES SYSTEM

q Mr. A. Giambusso ' -- October 24, 1973 2.

Modification of the Emergency Core Cooling System - In order to improve the performance of the ECCS after a break in the core flood line, crossover lines were installed in the Low Pressure Injection System. The late delivery of the material required to complete this modification has resulted in a delay in its installation and at least a corresponding delay in the critical path startup schedule.

3.

Reactor Coolant Pump Motor Repair - Subsequent to the reactor coolant system hydro, it was discovered that the "B" Reactor Coolant Pump Motor was damaged. The damage was in the back-stop clutch and on the associated part of the rotor shaft.

This damage necessitated shipping the clutch and the rotor back to the factory for repairs. An investigation into the cause of the problem and the associated inspection of the other motor clutches disclosed that all of the motor clutches had to be modified at the factory.

The inspection also revealed scue minor damage to the "C" reactor coolant pump motor clutch and as a result, this clutch had to be repaired at the factory.

The overall result of this particular problem was a delay on the critical path startup schedule and a corresponding delay in the start of hot functional testing and fuel load.

The above problems are now and have been major factors in delaying the Unit I fuel load date.

Before the impact of the above problems was analyzed, it was expected that Unit 1 would start hot functional testing on October 22, 1973, and subsequent fuel loading on December 21, 1973.

This would have meant that these events could have occurred prior to the expiration of the current Unit I construction pemit extension. Now, because of the above factors, the critical path schedule has been delayed at least 28 days. This means that hot functional testing will now start on November 19, 1973, and fuel load will start on January 18, 1974. These dates are based on the factors and schedule as we know them today.

It is reasonable to assume that there may be additional problems in the future testing program, but it is hoped that these problems will be minor in nature with little or no schedule impact. Therefore, May 1, 1974, should provide sufficient time to complete testing, even assuming some minor problems in the future.

In view of the above and the uncertainties of the future, which constitute good cause, Arkansas Power & Light Company hereby requests that the latest date of the completion of the facility specified in Provisional Construction Pemit No. CPPR-57 be extended from January 1,1974, to May 1, 1974.

Very truly yours,

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D. Phillips Senior Vice President JDP:lt 1

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