ML19345A753

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Submits Proposed Change 123 to Tech Specs,Adopting Second Control Rod Drop Time as Limiting Condition for Operation & Adhering to Control Rod Surveillance Program Per Description of Change for Remainder of Cycle 11
ML19345A753
Person / Time
Site: Yankee Rowe
Issue date: 02/18/1975
From: Johnson W
YANKEE ATOMIC ELECTRIC CO.
To:
Office of Nuclear Reactor Regulation
References
WYR-75-21, NUDOCS 8011250090
Download: ML19345A753 (4)
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Text

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Proposed Change No. 123 C.

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Telephone 687 366-90\\l TwZ 7:0 - 3 9 0+ 0 7 3 9 YANKEE ATOMIC ELECTRIC COMPANY WYR,5-21 e

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United States Nuclear Regulatory Commission

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j.gl Attention: Office of Nuclear Reactor Regulation

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Peference:

1) License No. DPR-3 (Docket No. 50-29)
2) Change No. 104, letter from D.

J. Skovholt, Y'J.-

DV DOL /AEC to YAEC, Attn:

L. E. Minnick,

'k'(/ k,y Vice President, November 15, 1972.

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3) Change No. 106, letter from D. J. Skovholt DOL /AEC to YAEC, Attn:

L. E. Minnick,

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Vice President, March 30, 1973.

4) Letter from L. H. Heider, YAEC, to DOL /AEC, September 4, 1974.

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5) Proposed Change No. 115, " Core XI Refueling", '

submitted.to DOL /AEC on March 29, 1974.

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6) Amendment No. 9, letter from K. R. Goller, Y^

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DOL /AEC to YAEC, Attn:

G. C. Andognini,

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July 30, 1974.

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Dear Sir:

Pursuant to Section 50.59 of the Co: mission's Rules and Regulations, the Yankee Atomic Electric Company hereb'; requests authorization to make the following change:

Reference is made to the Technical Specifications, PROPOSED CHANGE:

Appendix A of License No. DPR-3.

We propose to:

adopt a 2.50 second control rod drop time as a limiting 1) condition for operation, and; adhere to the control rod surveillance program stated under 2)

" Description of Change" for the remainder of Cycle XI and all subsequent Cycles.

As a result of difficulties with control rod drop REttSON FOR CHANGE:

times experienced early in the life of Cycle X, the current control rod surveillance program and limiting condition for operation are 8011250090 Q

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United States Nuclear Regulatory Commission February 18, 1975 Attn: Office of Nuclear Reactor Regulation Page Two requirementsincorqgJatedinjgyfacilitylicensebytheNRC'sissuance of Changc Hos. 104 and 106 YankeeAtomicnowproposestojgynge the control rod surveillance program based on current information and to change the control rod drop time based on Proposed Cygpge No.115 (5'5 9

which was approved by the NRC's issuance of Amendment No. 9 to the Facility Operating License allowing Cycle XI operation.

DESCRIPTICN OF CHANGE:

It is requested that all references to the rod drop time and surveillance program in Change Nos. 104 and 106 be deleted from the facility license and that the following addition be made to Appendix A of the Technical Specifications of said license.

F.

ROD DROP TIME LIMITING CONDITION FOR OPERATION The individual control rod drop times shall be 1 2.50 seconds from loss of stationary gripper coil voltage to 6 inch coil entry with:

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> 511 F and; avg -

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all reactor coolant pumps operating.

APPLICABILITY: Hot Standby.

ACTION:

a.

With the drop time of any rod determined to exceed the above limit, restore the drop time to within the above limit prior to proceeding to startup or power operation.

b.

With the rod drop times within limits but determined with 3 reactor coolant pumps operating, operation j

may proceed provided thermal power is restricted to 1 75 percent of rated thermal power.

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SURVEILLANCE REQUIREMENTS l

The rod drop time of control rods shall be demonstrated through measurement prior to reactor criticality:

a.

for all rods following each removal of the reactor vessel head; b.

for specifically affected individual rods following any maintenance on or modification to the rod drive system which could affect the drop time of those specific rods, and; c.

at least once per 18 months.

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4 United States Nuclear Regulatory Commission February 18, 1975 Attn: Office of Nuclear Reactor Regulation Page Three I

SAFETY CONSIDERATIONS: As stated above, Yankee Atomic proposes to increase the limit on control rod drop time from the current 2.40 seggpds to 2.50 seco.J,s based on the value shown in Proposed Changg)No. 115 which was approved by the NRC's issuance of Amendment No. 9 to the Facility Operating License allowing Cycle XI operation.

With respect to the proposed change in the surveillance program, our position en the safety considerations has already been stated in Reference 4.

In summary, testing, inspection and data evaluation reveal that the cause of the centrol rod malfunctions experienced early in Cycle X operation was associated with mechanical problems in the lower shroud assembly. Once these mechanical difficulties were corrected, tests and inspections during subsequent Cycle X operation and during the Cycle X-XI refueling outage revealed no unusual or abnormal conditions. Thus, the need for the current I

high surveillance frequency has been eliminated This proposed change has been reviewed by the Nuclear Safety Audit and Review Committee.

SCHEDULE OF CHANGE: We respectfully request review of this proposed change prior to the next scheduled reactor shutdown in the current control rod surveillance program. At present, the next surveillance test is scheduled for February 22, 1975.

Respectfully submitted, YANKEE ATOMIC ELECTRIC COMPANY J$hnson$$2.*7 7

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Vic President CO!.".ONWIA:.TH OF MASSACHUSETTS)

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COUNTY CF WORCESTER

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Then personally appeared before me, W. P. Johnson, who being duly sworn, did state that he is a Vice President of Yankee Atomic Electric Company, that he is duly authorized to execute and file the foregoing request in the name and on the behalf of Yankee Atomic Electric Company and that the statements therein are true to the best of his knowledge cnd belief.

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( Armand R. Soucy Notary Public My Commission Expires September 9, 1977 i

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[. s NRC DISTRIBUTION FOR PART SO DOCKET mal.iRI AL (TEMPORARY FORM) 2049 CONTROL NO:

Ardt t 01/ Tech. I FILE:

FROM: Yank ee Atomic E1ce. Co.

DATE OF DOC DATE REC'D LTR TWX RPT OTHER b'estborough, l' ASS 01581 en y,

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2/13/75 2/22/75 XXXX TO:

ORIG CC OTHER SENT AEC PDR X<XX US NRC 3 signed SENT LOCAL PDR WX CLASS UNCLASS PROPINFO INPUT NO CYS REC'D DOCKET NO:

XXX 3 signed 50-29 DESCRIPTION:

ENCLOSURES:

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Ltr trans Ardt to OL/ Change to Tech.

Specs. #123, NOTld).IZED 2/18, consisting (3 signed, 37 copics received) of adopting a 2.50 second control rod drop tiac as a limiting condition for j{ yf],}py g g opration, and adhering to the control rod survei l lance progrn=.....

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((... - L1_(JN PLAN 1 NAME: Yankee Atomic Elce. Co.

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FOR ACTION /INFORMATION LDM 2/24/75 BUTLER (L)

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SPELS W/ Copies W/ Copies W/ Copies W/ Copies KN!EL (L)

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MELTZ CASE PAWLICKl BALLARD P. KREUTZER (E)

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EXTERNAL DISTRICUTION

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