ML20043E621
| ML20043E621 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 05/31/1990 |
| From: | Devincentis J YANKEE ATOMIC ELECTRIC CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML20043E622 | List: |
| References | |
| BYR-90-073, BYR-90-73, NUDOCS 9006130207 | |
| Download: ML20043E621 (4) | |
Text
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YANKEE ATOMICELECTRIC COMPANY "C"l1R "g%'y'L*l"
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580 Main Street, Bolton, Massachusetts 01740-1398
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May 31, 1990 PC 236
- r BYR 90-073 United States Nuclear Regulatory Commission Attention: Document Control Desk Washington, DC 20555
References:
(a) License No. DPR-3 (Docket No. 50-29)
(b) Yankee Letter, BYR 90-004,. to US'4RC, Proposed Change 231, dated January 5, 1990 (c) USNRC Letter, NYR 90-038, to Yankee, Amendment 130, dated March-6, 1990
Subject:
Revision to Amendment 130 to Technical Specifications
Dear Sir:
i Pursuant to Section 50.90 of the Commission's Rules and Regulations, Yankee Atomic Electric Company (YAEC) hereby proposes the following~ amendment
.to Appendix A of the facility license.
' Proposed Change Reference is~made to the Technical Specification of Yankee Nuclear Power
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Station (YNPS), License No. DPR-3.
We proposed to modify the Technical Specification LCOs 3.10.3 and 3.10.4 incorporated by Reference (c) to correct an oversight made in our Reference (b) submittal. The modified Technical j.
Specification Pages 3/4 10-3 and 3/4 10-4 are contained in Attachment B.
i.
I Description of Change This proposed change incorporates wording from Standard Westinghouse Technical Specifications into YNPS's LC0 Specifications 3.10.3 and 3.10.4.
This wording allows physics testing to be conducted with the number of i;
OPERABLE Power Range and Intermediate Power Range Neutron Flux channels being determined by the LCO requirements of Technical Specification 3.3.1 instead of a
the specific number of channels presently specified.
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p U$ited States Nuclear Regulatory Commission May 31, 1990
-Document Control Desk-Page 2 BYR 90-073 Reason and Basis for Chante i
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The changes proposed by Reference (b) and incorporated by Reference (c) included a modification to Technical Specification LCOs 3.10.3 and 3.10.4 to require that'all Intermediate Power Range and Power Range Nuclear Channels be OPERABLE for physics testing. This change increased the number of OPERABLE nuclear channels from three to six during physics testing and was done.to take l
advantage of the wider range of trip setpoint adjustability with the new 1
nuclear instrumentation being installed this refueling outage.
Ilowever, the modifications to LCOs 3.10.3 and 3.10.4 did not account for the need to connect one or two of the nuclear flux channels to monitoring instrumentation used specifically for physics testing. This physics testing use of a channel (s) causes the channel (s) to be INOPERABLE from an LCO l
perspective.
This oversight, if not corrected, will prevent Yankee from performing its standard testing program of the new reload cores.
This proposed change corrects the above-described oversight by removing j
from the LCO of 3.10.3 and 3.10.4 the specific number of nuclear channels'to i
be OPERABLE and allowing the OPERABILITY requirements for nuclear channels to t
be determined by Specification 3.3.1.
Specification 3.3.1 requires that at least four channels be operable in modes including those when physics testing i
is performed. This nuclear channel configuration will result in more channels being required in the OPERABLE condition with reduced trip setpoints than in previous physics testing programs while giving Yankee the needed flexibility to connect physics testing instrumentation. Additionally, the wording of this I
change is consistent with NUREG-0452, " Standard Technical Specifications for
.j Westinghouse PWRs."
l Safety Considerations
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This change is requested to correct an oversight made in an earlier proposed change and is needed to allow Yankee to perform its standard testing program for new reload cores.
This proposed change does not:
L.
Involve a significant increase in the probability or consequences of an accident previously evaluated. This proposed change will allow Yankee to i
perform its standard physics testing program for reactor cores to ensure that the plant.'s response to transients is consistent with analytical evaluation.
t 2.
Create the possibility of a new or different kind of accident from any previously evaluated. This proposed change will allow Yankee to conduct its standard physics testing program with more of the plant's nuclear instrumentation required OPERABLE with reduced setpoints than previously required.
3.
Involve a significant reduction in a margin of safety. This proposed change will not modify the existing requirement that the trip setting of 4
OPERABLE nuclear channels be set at less than or equal to 25% of RATED THERMAL POWER and will increase the number of OPERABLE nuclear channels with reduced setpoints from the minimum of three required prior to Amendment 130 to a minimum of four durirg physics testing.
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.c,Uidted State's Nuclear Regulatory Commission May 31, 1990 o
Document Control Desk Page 3 BYR 90-073 Based on the discussion above, it is concluded. that there is reasonable assurance that the operation of the Yankee plant, consistent with the proposed Technical Specifications, will not endanger the health and safety of the public. This proposed change.has been reviewed by the Nuclear Safety Audit and Review Committee.
i Schedule Amendment 130 becomes effective as of August 1, 1990.
It is requested that this proposed change b~e approved and become effective on the same schedule.
We trust that you will find this submittal satisfactory; however, should you desire additional information, please contact us Very truly yours,
)
YANKEE ATOMIC ELECTRIC COMPANY kk (wh J. DeVincentis Vice President 4
JD/gjt/WPP74/34 cc:.USNRC Region I USNRC Resident Inspector,.YNPS
-Attachments COMMONWEALTH OF MASSACHUSETTS)
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WORCESTER COUNTY
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.Then personally appeared before me, J. DeVincentis, who, being duly sworn, did state % t he is Vice President of Yankee Atomic' Electric Company, that he is duly ausw riz'ed to execute and file the foregoing document in the name and on the Lp.,1t' of Yankee Atomic Electric Company and that the statements therein are true to the best of his knowledge and belief.
"l zu b b uoneGLcr Helen D.'Sammarco Notary Public My Commission Expires November 7, 1991
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ATTACHMENT A Proposed Change Synopsis
SUMMARY
This proposed change modifies Technical Specification LCOs 3.10.3 and 3.10.4 to correct an oversight made in Proposed Change 231 and incorporated by Amendment 130.
DISCUSSION This proposed change incorporates wording from Standard Westinghouse Technical Specifications into YNPS's LCO Specifications 3.10.3 and 3.10.4.
This wording allows physics testing to be conducted with the number of OPERABLE Power Range and Intermediate Power Range Neutron Flux channels being determined by the LCO t
requirements of Technical Specification 3.3.1 instead of the specific number of channels presently specified.
The modifications to LCOs 3.10.3 and 3.10.4 under Proposed Change 231 did not account for the need to connect one or two of the nuclear flux channels to monitoring instrumentation used specifically for physics testing.
This physics testing use of a channel (s) causes the channel (s) to be INOPERABLE f rom an LCO perspective.
This oversight, if not corrected, will prevent Yankee from performing its standard testing program of the new reload cores.
This proposed change corrects the above-described oversight by removing from the LCO of 3.10.3 and 3.10.4 the specific number of nuclear channels ~to be OPERABLE and allowing the OPERABILITY requirements for nuclear channels to be determined by Specification 3.3.1.
Specification 3.3.1 requires that at least four channels be operable in modes including those when physics testing is performed.
This nuclear channel configuration will result in more channels being required in the OPERABLE condition with reduced trip setpoints than in previous physics testing programs while giving Yankee the needed flexibility to connect physics testing instrumentation. Additionally, the wording of this change is consistent with NUREG-0452, " Standard Technical Specifications for Westinghouse PWRs."
CONCLUSION The proposed specification modifications will allow Yankee to perform its standard physics testing program for new reload cores and still maintain a greater number of channels with reduced setpoints than existed prior to Amendment 130.
Based on the considerations contained herein, it is concluded that there is reasonable assurance that operation of YNPS, consistent with this proposed Technical Specification, will not endanger the health and safety of the public.
Therefore, this proposed change should be approved.
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. WPP74/34