ML17055E307
| ML17055E307 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 10/31/1988 |
| From: | Capra R Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML17055E305 | List: |
| References | |
| NUDOCS 8811090448 | |
| Download: ML17055E307 (14) | |
Text
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 NIAGARA MOHAWK POWER CORPORATION DOCKET NO. 50-220 NINE MILE POINT NUCLEAR STATION, UNIT 1 AMENDMENT TO FACILITY OPERATING LICENSE Amendment No. 10 1 License No.
DPR-63 1.
The Nuclear Regulatory Commission (the Commission) has found that:
A.
The application for amendment by Niagara Mohawk Power Corporation (the licensee) dated March 7, 1988, as supplemented April 13,
- 1988, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended tthe Act) and the Commission's rules and regulations set forth in 10 CFR Chapter I; B.
The facility will operate in conformity with the application, the provisions of the Act, and the rules and regulations of the Commission.
A related exemption from the provisions of 10 CFR 50.62(c)(4) was issued at the same time as this amendment; C.
There is reasonable assurance (i) that the activities authorized by this amendment can be conducted without endangering the health and safety of the public, and (ii) that such activities will be conducted in compliance with the Commission's regulations; D.
The issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public; and E.
The issuance of this amendment is in accordance with 10 CFR Part 51 of the Commission's regulations and all applicable requirements have been satisfied.
2.
Accordingly, the license is amended by changes to the Technical Specifications as indicated in the attachment to this license amendment, and paragraph 2.C,(2) of Facility Operating License No.
DPR-63 is hereby amended to read as follows:
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(2)
Technical S ecifications The Technical Specifications contained in Appendix A as revised through Amendment No. 10 1 are hereby incorporated into this license.
Niagara Mohawk Power Corportation shall operate the facility in accordance with the Technical Specifications and the Environmental Protection Plan.
3.
This license amendment is effective as of the date of its issuance, to be implemented within 30 days.
FOR THE NUCLEAR REGULATORY COMMISSION Robert A. Capra, Director Project Directorate I-l Division of Reactor Projects, I/II
Attachment:
Changes to the Technical Specifications Date of Issuance:
October 31,.1l988
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0 UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 ATTACHMENT TO LICENSE AMENDMENT AMENDMENT NO. 10 TO FACILITY OPERATING LICENSE NO.
DPR-63 DOCKET NO. 50-220 Revise Appendix A as follows:
Remove Pa es 42 43 45 Insert Pa es 41 42 43
LIHITING CONDITION FOR OPERATION SURVEILLANCE RE UIREHENT c.
The liquid poison tank shall contain a
minimum of 1185 gallons of boron bearing solution.
The solution shall have a
sufficient concentration of sodium pentaborate enriched with Boron-10 isotope to satisfy the equivalency equation.
C x 628300 x~
x E
13'L wt H
86 GPH 19.8X Atom Remove the squibs from the valves and verify that no deterioration has occurred by actual field firing of the removed squibs.
In addition, field. fire one squib from the batch of replacements.
Disassemble and inspect the squib-operated valves to verify that valve deterioration has not occurred.
Where:
C =
Sodium Pentaborate Solution Concentration (Wt 'L)
H =
Hass of Water in Reactor Vessel and Recirculation piping at Hot Rated Conditions (501500 lb)
Q =
Liquid Poison Pump Flow Rate (30 GPH nominal)
E =
Boron-10 Enrichment (Atom l) d.
The liquid poison solution temperature shall not be less than the temperature presented in Figure 3.1.2.b.
e.
If Specifications "a" through "d" are not met, initiate normal orderly shutdown within one hour.
(2)
At least once er month Demineralized water shall be recycled to the test tank.
Pump discharge pressure and minimum flow rate shall be verified.
b.
Boron Solution Checks:
(1)
At least once er month Boron concentration shall be determined.
(2)
At least once er da Solution volume shall be checked.
In
- addition, the sodium pentaborate concentration shall be determined and conformance with the requirements of the equivalency equation shall be checked any time water or boron are added or if the solution temperature drops below the limits specified by Figure 3.1.2.b.
Amendment No.
101 41
LIMITING CONDITION FOR OPERATION SURVEILLANCE RE UIREMENT (3)
At least once er da The solution temperature shall be checked.
(4)
At least once er o eratin c cle Verify enrichment by analysis.
c.
Surveillance with Ino erable Com onents Nhen a component becomes inoperable its redundant component shall be demonstrated to be operable immediately and daily thereafter.
Amendment No.
101 42
(Thi s page left intentionally blank. )
Amendment No.
101
BASES FOR 3.1.2 AND 4.1.2 LI UID POISON SYSTEH The liquid poison system (Section VII-C*) acting alone does not prevent fuel clad damage for any conceivable type of Station transient.
This system provides a backup to permit reactor shutdown in the event of a massive failure of the control rods to insert.
V The liquid poison system is designed to provide the capability to bring the reactor from full design rating (1850 thermal megawatts) to a cold, xenon free shutdown condition assuming none of the control rods can be inserted.
A concentration of 120 ppm of boron-10 (the boron isotope with a high neutron cross section) in the reactor coolant will bring the reactor from full design rating
( 1850 thermal megawatts) to greater than 3 percent delta k subcritical (0.97 keff) considering the combined effects of the control rods, coolant voids, temperature
- change, fuel doppler,
In order to provide good mixing, the injection time has to be greater than 17 minutes(Z). The rate of boron-10 injection must also be sufficient to achieve hot shutdown during ATWS events.
The liquid poison storage tank minimum volume assures that the above requirements for boron solution insertion are met with one 30 gpm liquid poison pump.
The quantity of Boron-10 isotope required to be stored in solution includes an additional 25 percent margin beyond the amount needed to shutdown the reactor to allow for any unexpected non-uniform mixing.
The relationship between sodium pentaborate concentration and sodium pentaborate Boron-10 enrichment must satisfy the equivalency equation:
(1)
C x
628300 x
(}
x 6
13'L wt H
86 GPH 19.8V. Atom Where:
Q a E =
Sodium Pentaborate Solution Concentration (Wt 'L)
Hass of Water in Reactor Vessel and Recirculation piping at Hot Rated Conditions (501500 lb)
Liquid Poison Pump Flow Rate (30 GPH nominal)
Boron-10 Enrichment (Atom L)
The tank volume requirements include consideration for 197 gallons of solution which is contained below the point where the pump takes suction from the tank and therefore cannot be inserted into the reactor.
The solution saturation temperature varies with the concentration of sodium pentaborate.
Figure 3.1.2.b.
includes a
5F margin above the saturation temperature to guard against precipitation.
Temperature and liquid level alarms for the system are annunciated in the Control Room.
- FSAR (1)
GE Topical Report NEDE-31096-P-A, "Anticipated Transients Without Scram.
Response
to ATWS Rule 10CFR50.62."
(2)
GE Report NEDC-30921, "Assessment of ATWS Compliance Alternatives."
Amendment No.
101