ML16012A003

Draft Unacceptable with Opportunity to Supplement Requested Licensing Action Email, Revise Technical Specifications to Incorporate Updated Criticality Safety Analysis

ML16012A003
Person / Time
Site:	Palo Verde
Issue date:	01/11/2016
From:	Watford M Plant Licensing Branch IV
To:	Dilorenzo M, Elkinton D, Stephenson C, Weber T Arizona Public Service Co
Watford M
References
CAC MF7138, CAC MF7139, CAC MF7140
Download: ML16012A003 (2)

Text

1 Burkhardt, Janet From:

Watford, Margaret Sent:

Monday, January 11, 2016 5:15 PM To:

Carl Stephenson; Del Elkinton; Mike Dilorenzo; Tom Weber Cc:

Klos, John

Subject:

DRAFT Unacceptable with Opportunity to Supplement: LAR to Revise TSs to Incorporate Updated Criticality Analysis for Palo Verde, Units 1, 2, and 3 (MF7138, MF7139, and MF7140)

Tom, By letter dated November 25, 2015, Arizona Public Service Company (APS) submitted a license amendment request to revise its Technical Specifications (TSs) to incorporate updated criticality safety analysis for Palo Verde Nuclear Generating Station, Units 1, 2, and 3. As we discussed on the phone today, NRC has reviewed your application and concluded that the information below is necessary to begin its detailed technical review. A conference call will be scheduled with NRC and your staff to discuss these insufficiencies in detail. Please let me know if Friday, January 15th at 10 a.m. EST will work for your staff.

1. In Section 4.3, Significant Hazards Consideration, the licensee answers No to all three questions.

a. In Question 1, please explain how the increased complexity of the spent fuel pool storage requirements and the transitional period when two separate sets of requirements will be in place do not result in a significant increase in the probability of a fuel assembly misloading or justify your current answer. While there will be procedures controlling the movement of fuel, the requirements will be more complex indicating the likelihood of an increased probability of a human error in creating the fuel handling move sheets.

b. Section 5.6.5 of WCAP 18030P states, With the incorporation of SNAPIN inserts, a new potential accident event is created. However, Question 2 of the Significant Hazards Consideration indicates there is no potential for a new or different accident than was previously analyzed. Please revise the Significant Hazards Consideration or justify the current answer.

2. The requirements for maintaining an adequate interface between different arrays is described in WCAP 18030P, Section 5.3, Interface Conditions are not captured in the proposed technical specifications. Revise the proposed technical specifications to include the interface requirements or justify why interface conditions are not included in the technical specifications.

3. Provide the analysis supporting the modeling of fuel assembly grids and spacers discussed in WCAP 18030P, Section 5.1.2.3, Grid and Sleeves.

4. Provide the analysis described in WCAP18030P, Section 5.2.3.2, Storage Array Biases & Uncertainties Results.

Thank you, Maggie Watford Project Manager NRR/DORL/LPL41 Phone: 3014151233 Email: Margaret.Watford@nrc.gov Cube: O8H08

2 Mailstop: O8H4A