05000529/LER-2007-002, Regarding Condition Prohibited by Technical Specification - CEA Insertion Limit Exceeded

Regarding Condition Prohibited by Technical Specification - CEA Insertion Limit Exceeded

ML071030123
Person / Time
Site:	Palo Verde
Issue date:	04/04/2007
From:	Bement R Arizona Public Service Co
To:	Document Control Desk, NRC/NRR/ADRO
References
102-05679-RSB/TNW/REB/DFH LER 07-002-00
Download: ML071030123 (8)

LER-2007-002, Regarding Condition Prohibited by Technical Specification - CEA Insertion Limit Exceeded

Event date:
Report date:
Reporting criterion:	10 CFR 50.73(a)(2)(i) 10 CFR 50.73(a)(2)(vii), Common Cause Inoperability 10 CFR 50.73(a)(2)(ii)(A), Seriously Degraded 10 CFR 50.73(a)(2)(viii)(A) 10 CFR 50.73(a)(2)(ii)(B), Unanalyzed Condition 10 CFR 50.73(a)(2)(viii)(8) 10 CFR 50.73(a)(2)(iii) 10 CFR 50.73(a)(2)(ix)(A) 10 CFR 50.73(a)(2)(iv)(A), System Actuation 10 CFR 50.73(a)(2)(x) 10 CFR 50.73(a)(2)(v)(A), Loss of Safety Function - Shutdown the Reactor 10 CFR 50.73(a)(2)(v)(B), Loss of Safety Function - Remove Residual Heat 10 CFR 50.73(a)(2)(i)(A), Completion of TS Shutdown 10 CFR 50.73(a)(2)(v), Loss of Safety Function 10 CFR 50.73(a)(2)(i)(B), Prohibited by Technical Specifications
5292007002R00 - NRC Website

text

10 CFR 50.73 m

A subsidiary of Pinnacle West Capital Corporation Palo Verde Nuclear Generating Station Robert S. Bement Vice President Nuclear Operations Tel (623) 393-6116 Fax (623) 393-6077 Mail Station 7602 PO Box 52034 Phoenix, Arizona 85072-2034 102-05679-RSBITNW/REB/DFH April 04, 2007 ATTN: Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001

Dear Sirs:

Subject:

Palo Verde Nuclear Generating Station (PVNGS)

Unit 2 Docket No. STN 50-529 License No. NPF 51 Licensee Event Report 2007-002-00 Attached, please find Licensee Event Report (LER) 50-529/2007-002-00 which reports a condition prohibited by Technical Specification (TS) when Unit 2 entered Limiting Condition for Operation (LCO) 3.0.3 for a period greater than 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> due to the insertion of four Control Element Assemblies (CEA).

In accordance with 10 CFR 50.4, copies of this LER are being forwarded to the NRC Regional Office, NRC Region IV and the Senior Resident Inspector. If you have questions regarding this submittal, please contact Ray E. Buzard, Section Leader, Regulatory Affairs, at (623) 393-5317.

Arizona Public Service Company makes no commitments in this letter.

Sincerely, RSB/TNW/REB/DFH/gt Attachment cc:

B. S. Mallett M. B. Fields M. T. Markley G. G. Warnick NRC Region IV Regional Administrator NRC NRR Project Manager - (send electronic and paper)

NRC NRR Project Manager - (send electronic and paper)

NRC Senior Resident Inspector for PVNGS A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway 9 Comanche Peak

• Diablo Canyon Palo Verde South Texas Project e Wolf Creek

NRC FORM 366 U.S. NUCLEAR REGULATORY COMMISSION APPROVED BY OMB: NO. 3150-0104 EXPIRES: 06/30/2007 (6-2004)

, the NRC may sfor each block) not conduct or sponsor, and a person is not required to respond to, the digits/characters finformation collection.

3. PAGE Palo Verde Nuclear Generating Station Unit 2 05000529 1 OF 7

4. TITLE Condition Prohibited by Technical Specification - CEA Insertion Limit Exceeded

5. EVENT DATE

6. LER NUMBER

7. REPORT DATE

8. OTHER FACILITIES INVOLVED FACILITY NAME DOCKET NUMBER MONTH DAY YEAR YEAR SEQUENTIAL REV MONTH DAY YEAR None 05000 NUMBER NO.

Nn 50 FACILITY NAME DOCKET NUMBER 02 03 2007 2007 - 002 -

00 04 04 2007 None 05000

9. OPERATING MODE

11. THIS REPORT IS SUBMITTED PURSUANT TO THE REQUIREMENTS OF 10 CFR§: (Check all that apply)

El 20.2201(b)

El 20.2203(a)(3)(i)

El 50.73(a)(2)(i)(C)

El 50.73(a)(2)(vii)

[1 20.2201(d)

E] 20.2203(a)(3)(ii)

[] 50.73(a)(2)(ii)(A)

E] 50.73(a)(2)(viii)(A)

El 20.2203(a)(1)

E] 20.2203(a)(4)

E] 50.73(a)(2)(ii)(B)

[] 50.73(a)(2)(viii)(8)

El 20.2203(a)(2)(i)

[I 50.36(c)(1)(i)(A)

El 50.73(a)(2)(iii)

E] 50.73(a)(2)(ix)(A)

10. POWER LEVEL E] 20.2203(a)(2)(ii)

[] 50.36(c)(1)(ii)(A)

El 50.73(a)(2)(iv)(A)

El 50.73(a)(2)(x)

[3 20.2203(a)(2)(iii)

El 50.36(c)(2)

El 50.73(a)(2)(v)(A)

[3 73.71(a)(4)

El 20.2203(a)(2)(iv)

[] 50.46(a)(3)(ii)

El 50.73(a)(2)(v)(B)

El 73.71(a)(5) 100 El 20.2203(a)(2)(v)

El 50.73(a)(2)(i)(A)

El 50.73(a)(2)(v)(C)

El OTHER [3 20.2203(a)(2)(vi)

Z 50.73(a)(2)(i)(B)

El 50.73(a)(2)(v)(D)

Specify in Abstract below or in (If more space is required, use additional copies of (If more space is required, use additional copies of (If more space is required, use additional copies of (If more space is required, use additional copies of (If more space is required, use additional copies of (If more space is required, use additional copies of NRC Form 366A)

8.

PREVIOUS SIMILAR EVENTS

In the past three years, no similar event was reported for multiple CEAs being inserted beyond TS Limits.

9.

OTHER:

On July 20, 2006, APS submitted a request for an amendment to TS 3.1.6, "Shutdown Control Element Assembly (CEA) Insertion Limits." The proposed amendment would revise TS 3.1.6 which currently requires the Shutdown CEAs to be 144.75 inches withdrawn. Through an evaluation it has been determined that this limit is non-conservative. The proposed amendment would change this limit to 147.75 inches withdrawn. This limit is currently controlled administratively.