ML20058A863
| ML20058A863 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 10/11/1990 |
| From: | Wilson B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML20058A846 | List: |
| References | |
| 50-327-90-29, 50-328-90-29, NUDOCS 9010290256 | |
| Download: ML20058A863 (4) | |
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ENCLOSURE 1 NOTICE OF VIOLATION Tennessee Volley Authority Docket Nos. 50-327 and 50-328 Sequoyah License Nos. DPR-77 and DRP-79 During an NRC inspection conducted on August 27-31, 1990, violations of NRC requirements were identified.
In accordance with the " General Statement of Policy and Procedure for NRC Enforcement Actions," 10 CFR Part 2, Appendix C (1990), the violations are listed below:
A.
Technical Specification 2.2.1 -(Table 2.2-1, item 2) requires that the Limiting Safety System Setting for the power range neutron flux low trip setpoint be less than or equal to 26 percent of Rated Thermal Power and that the Limiting Safety System for the power range neutron flux high trip setpoint be less than or' equal to.110 percent of Rated Thermal Power.
Technical Specification 6.8.1.c requires that written procedures shall be provided for surveillance and test activities.
. Contrary to the above, procedure TI-81 (used for both units), when first issued in - 1984, and -when subsequently reissued as procedures 1/2-PI-NXX-092-001.0, was not correct and did not properly follow vendor recommendations to adjust power range instrument channels to account for reduced neutron flux leakage to the detectors. Consequently, when Unit I was started up on May 31, 1990, the low power trip setpoint and the high power tripisetpoint were each about 20 percent: higher than the. respective limiting safety system settings, and that situation persisted until June 5, 1990.
This is a Severity Level -IV. violation (Supplement I).
'B.
Technical Specification 6.8.1.c requires: that written procedures shall be implemented for surveillance and test activities.
(1) Procedure 0-PI-NXX-092-001.0, Incore-Excore Detector Calibration, indicates', by example,.that three full-core flux maps and eight quarter-core flux maps be obtained for analysis, but does allow the number of maps to be reduced at the discretion of the test director.
The' procedure also requires that.the maps be obtained at power levels above 70. percent Rated Thermal Power.
Contrary to the above:
'(a) Procedure performed for Unit 1 in the period June' 7 to July 26, 1990 and August 4, 1990, used only two maps, both full' core.
Licensee personnel acknowledged that this had become h
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i ennessee Valley Authority 2
Docket Nos. 50-327 and 50-328 T
b Sequoyah License Nos. DPR-77 and DRP-79 common practice on both units.
Two maps are insufficient to demonstrate that a linear relationship exists between the incore and excore axial power distributions, the point of the test.
(b) The procedure performed in the period from June 7 to July 26, 1990, was performed at about 30 percent Rated Thermal Power, and a procedure was not performed at the required power level until August 4, 1990, after extended operation above 70 percent rated thermal power.
(2) Procedure 0-SI-NXX-092-079.0 requires independent verification of test results in step 7,0(2).
Contrary to the above, the independent verification step was not signed off for Unit 1 procedures performed on June 8,1990, and June 15-20, 1990.
This is a Severity Level IV violation (Supplement I).
Pursuant to the provisions of 10 CFR 2.201, Tennessee Valley Authority is hereby required to submit a written statement or explanation to the U.S.
Nuclear Regulatory Commission, ATTN:
Document Control Desk, Washington, D.C.
20555 with a copy to the Regional Administrator, Region II, and if applicable,
- a. copy to the NRC Resident Inspector, within 30 days of the date of the letter transmitting this Notice of Violation (Notice).
This reply should be clearly marked as a " Reply to a Notice of Violation" and should include [for each violation]:
(1) the reason for the violation, or, if contested, the basis for disputing the' violation,-(2) the corrective steps that have been taken and the
'results achieved, (3) the corrective steps that will be taken to avoid further-violations, and (4)' the date when full compliance will be achieved.
If an adequate reply is not-received within the time specified in.this. Notice, an order may be issued to show cause why the license should not be modified, suspended, or revoked, or why such other action as may be proper should not be,
taken. Where good cause is shown, consideration will be given to-extending the.
response time.-
FOR THE NUCLEAR REGULATORY COMMISSION-
+OffL jp Bruce A.-[ikson TVA Projects Dated at Atlanta, Georgia s
this d day of October 1990
-i I
ENCLOSURE 1 NOTICE OF VIOLATION, Tennessee Valley Authority Docket Nos. 50-327 and 50-328 Sequoyah License Nos. DPR-77 and DRP-79 During an NRC inspection conducted on August 27-31, 1990, violations of NRC requirements were identified.
In accordance with the " General Statement of Policy and Proceoure for NRC Enforcement Actions," 10 CFR Part 2, Appendix C (1990), the violations are listed below:
A.
Technical Specification 2.2.1 (Table 2.2-1, Item 2) requires that the Limiting Safety System Setting for the power range neutron flux low trip setpoint be less than or equal to 26 percent of Rated Thermal Power and that the Limiting Safety System for the power range neutron flux high trip setpoint be less than or equal to 110 percent of Rated. Thermal Power.
Technical Specification 6.8.1.c requires that written procedures shall be provided for surveillance and test activities.
.j Contrary to the above, procedure TI-81 (used for both units),- when first issued in 1984, and -when subsequently reissued as
)rocNuces 1/2-PI-NXX-092-001.0, was not correct and did not properly follow vendor recommendations to adjust power range instrument channels to account for reduced neutron flux leakage to the detectors. Consequently, when Unit I was started up on May 31, 1990, the' low power trip setpoint and the high power trip setpoint were each about 20 percent higher than the respective limiting safety system settings, and that situation persisted until June 5, 1990.
This is a Severity Level IV violation (Supplement I).
B.
Technical Specification 6.8.1.c requires that written procedures shall be implemented for surveillance and test activities.
(1) Procedure 0-PI-NXX-092-001.0, incore-Excore Detector Calibration, indicates, by example, that three full-core flux maps and eight quarter-core flux maps be obtained for analysis,' but does allow the number of maps to be reduced at the discretion of the test director.
The procedure. also requires that the maps be obtained at power levels
-above 70 percent Rated Thermal Power.
Contrary to the above:
(a) Procedure performed fer Unit 1. in the period June 7 to July 26,-1990 and Auost 4, 1990 used only two maps, both full core.
Licensee personnel acknowledged that this had become-M n
'l*
.c
L Tennessee'Vallry *uthority 2
Docket Nos. 50-327 and b0-328 Sequoyah License Nos. DPR-77 and DRP-79
.commen practice on both units.
Two maps are insufficient to demonstrate that a linear relat?onship exists between the innre and excore axial power dist-ibutions, the point of the test.
(b) The procedure performed in the period from June 7 to July 26, 1990, was performed at about 30 percent Rated Thermal Power, and a procedure was not performed at the required power level until August 4,1990, af ter extended operation above 70 percent rated thermal power.
(2) Procedure 0-SI-NXX-092-079.0 requires independent verification of 1
test results in step 7.0(2).
Contrary to the above, the independent verification step was not signed off for Unit 1 procedures performed on June 8,1990, and June 15-20, 1990.
This is a Severity Level IV violation (Supplement !).
Pursuant to the provisions of 10 CFR 2.201, Tennessee Valley Authority is hereby required to submit a written statement or explanation to the U.S.
Nuclear Rep:latory Commission, ATTN:
Document Control Desk, We.shington, D.C.
20555 with'a copy to the Regional. Administrator, Region II, and if applicable, a copy to the NRC Resident Inspector, within 30 days of.the date of the letter
. transmitting this Notice of Violation (Notice).
This reply should be clearly marked as a " Reply to a Notice of Violation" and should include [for each violation]:
(1) the reason for the violation, or, if contested, the basis for disputing the violation, (2) the corrective steps that have"been taken and the results achieved, (3) the corrective steps that will be taken to avoid further violations, and (4) the :date when full compliance will be achieved.
If en adequate reply is not received within the time specified in this Notice. an-order may be issued to show cause why the license should not be modified, suspended, or revoked, or why such other action as may-be proper should not be taken._ Where good cause is shown, consideration will be given to extending th-response time.
FOR THE NUCLEAR REGULATORY COMMISSION BruceA.[ison TVA Projects Dated at Atlanta, Georgia this g day of October 1990